{"id":"GHSA-rpr9-rxv7-x643","revision":null,"records":[{"revision":"a13cb817a77f49e9bcfdb486ef5bfc16","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44990","aliases":[],"title":"Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`","description":"ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlled content inside a disallowed `xmp` element into live HTML or JavaScript. This is a sanitizer bypass in the default `disallowedTagsMode: 'discard'` path and can lead to stored XSS in applications that render sanitized output back to users. Version 2.17.4 patches the issue.","state":0,"publishedAt":"2026-06-12T20:39:47.065+00:00","modifiedAt":"2026-09-10T12:05:09.696+00:00","affected":[{"ecosystem":"Vendor product","name":"sanitize-html","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"apostrophecms\",\n                    \"product\": \"sanitize-html\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.17.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","score":9.3,"severity":"CRITICAL"}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44990","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44990","identifiers":["CVE-2026-44990"]},"retained":false,"historicalAffected":[]},{"revision":"88070fce05334e2d9b8e78c77d571d74","observedAt":"2026-11-07T10:32:56.119+00:00","statement":{"source":"euvd","id":"EUVD-2026-36566","aliases":["CVE-2026-44990","GHSA-rpr9-rxv7-x643"],"title":"ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlle…","description":"ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlled content inside a disallowed `xmp` element into live HTML or JavaScript. This is a sanitizer bypass in the default `disallowedTagsMode: 'discard'` path and can lead to stored XSS in applications that render sanitized output back to users. Version 2.17.4 patches the issue.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","score":9.3,"severity":null}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36566","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 12, 2026, 8:39:47 PM","dateUpdated":"Sep 10, 2026, 12:05:09 PM"},"relatedAdvisories":[{"id":"RHSA-2026:41064","title":"Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.11.10 security update","vulnerabilityIds":["CVE-2025-9288","CVE-2025-13465","CVE-2026-21721","CVE-2026-22029","CVE-2026-25639","CVE-2026-42508","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-44990","CVE-2026-46384","CVE-2026-46385"]},{"id":"RHSA-2026:77321","title":"Red Hat Security Advisory: OpenShift Container Platform 4.13.72 bug fix and security update","vulnerabilityIds":["CVE-2026-26996","CVE-2026-33186","CVE-2026-33814","CVE-2026-44990","CVE-2026-46597","CVE-2026-59869","CVE-2026-75885","CVE-2026-75887"]},{"id":"RHSA-2026:66371","title":"Red Hat Security Advisory: OpenShift Container Platform 4.19.47 bug fix and security update","vulnerabilityIds":["CVE-2026-33814","CVE-2026-44990","CVE-2026-46597","CVE-2026-48801","CVE-2026-54284","CVE-2026-56852"]},{"id":"RHSA-2026:63046","title":"Red Hat Security Advisory: OpenShift Container Platform 4.21.32 bug fix and security update","vulnerabilityIds":["CVE-2026-27136","CVE-2026-33814","CVE-2026-35469","CVE-2026-44990","CVE-2026-45623","CVE-2026-54272","CVE-2026-69153","CVE-2026-73566"]},{"id":"RHSA-2026:36883","title":"Red Hat Security Advisory: multicluster engine for Kubernetes v2.9.5 security update","vulnerabilityIds":["CVE-2026-39821","CVE-2026-39829","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-44990"]},{"id":"RHSA-2026:67936","title":"Red Hat Security Advisory: OpenShift Container Platform 4.16.71 bug fix and security update","vulnerabilityIds":["CVE-2025-30204","CVE-2026-33814","CVE-2026-33818","CVE-2026-42504","CVE-2026-43003","CVE-2026-44918","CVE-2026-44990","CVE-2026-45623","CVE-2026-48801","CVE-2026-56852","CVE-2026-56858","CVE-2026-56859","CVE-2026-56860","CVE-2026-56862","CVE-2026-66138","CVE-2026-69153"]},{"id":"RHSA-2026:46903","title":"Red Hat Security Advisory: Red Hat Advanced Cluster Management for 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media","vulnerabilityIds":["CVE-2023-45289","CVE-2025-4673","CVE-2026-44990","CVE-2026-56852"]},{"id":"RHSA-2026:46598","title":"Red Hat Security Advisory: OpenShift Virtualization v4.20 Images","vulnerabilityIds":["CVE-2026-44990"]},{"id":"RHSA-2026:46885","title":"Red Hat Security Advisory: multicluster engine for Kubernetes v2.10.4 security update","vulnerabilityIds":["CVE-2025-58183","CVE-2026-16242","CVE-2026-17107","CVE-2026-33747","CVE-2026-33748","CVE-2026-33811","CVE-2026-34986","CVE-2026-39828","CVE-2026-39829","CVE-2026-39830","CVE-2026-39835","CVE-2026-42508","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-44740","CVE-2026-44990","CVE-2026-59869"]},{"id":"RHSA-2026:70267","title":"Red Hat Security Advisory: Red Hat Quay 3.14.9","vulnerabilityIds":["CVE-2026-4427","CVE-2026-6322","CVE-2026-9277","CVE-2026-10143","CVE-2026-12143","CVE-2026-13149","CVE-2026-13676","CVE-2026-14257","CVE-2026-15792","CVE-2026-15927","CVE-2026-16221","CVE-2026-18255","CVE-2026-32591","CVE-2026-33747","CVE-2026-33748","CVE-2026-33818","CVE-2026-39820","CVE-2026-39821","CVE-2026-39822","CVE-2026-39828","CVE-2026-39829","CVE-2026-39830","CVE-2026-39831","CVE-2026-39832","CVE-2026-39835","CVE-2026-42151","CVE-2026-42154","CVE-2026-42499","CVE-2026-42504","CVE-2026-42508","CVE-2026-44432","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-44705","CVE-2026-44990","CVE-2026-46595","CVE-2026-46597","CVE-2026-48526","CVE-2026-49477","CVE-2026-54058","CVE-2026-54060","CVE-2026-55379","CVE-2026-55380","CVE-2026-56852","CVE-2026-56853","CVE-2026-56858","CVE-2026-56859","CVE-2026-56860","CVE-2026-56862","CVE-2026-57231","CVE-2026-59197","CVE-2026-59199","CVE-2026-59200","CVE-2026-59204","CVE-2026-59205","CVE-2026-59869","CVE-2026-59885","CVE-2026-59886","CVE-2026-67213","CVE-2026-67214","CVE-2026-67313","CVE-2026-67314","CVE-2026-67320","CVE-2026-67321","CVE-2026-69152","CVE-2026-69153","CVE-2026-73086","CVE-2026-73088","CVE-2026-73089","CVE-2026-84375"]},{"id":"RHSA-2026:43052","title":"Red Hat Security Advisory: Red Hat Quay 3.12.20","vulnerabilityIds":["CVE-2026-12143","CVE-2026-32591","CVE-2026-39820","CVE-2026-39821","CVE-2026-39828","CVE-2026-39829","CVE-2026-39830","CVE-2026-39832","CVE-2026-39835","CVE-2026-42151","CVE-2026-42154","CVE-2026-42499","CVE-2026-42508","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44990","CVE-2026-45822","CVE-2026-46597"]},{"id":"SUSE-SU-2026:4585-1","title":"Security update 5.2.1 for Multi-Linux Manager Client Tools","vulnerabilityIds":["CVE-2023-45289","CVE-2024-22195","CVE-2025-13836","CVE-2025-4673","CVE-2025-61686","CVE-2026-0864","CVE-2026-11940","CVE-2026-11972","CVE-2026-1229","CVE-2026-13346","CVE-2026-14199","CVE-2026-1502","CVE-2026-15308","CVE-2026-1703","CVE-2026-17033","CVE-2026-17183","CVE-2026-19197","CVE-2026-19475","CVE-2026-21723","CVE-2026-2303","CVE-2026-27459","CVE-2026-3219","CVE-2026-3276","CVE-2026-33814","CVE-2026-3446","CVE-2026-3479","CVE-2026-39821","CVE-2026-39882","CVE-2026-40181","CVE-2026-40475","CVE-2026-41066","CVE-2026-41178","CVE-2026-41606","CVE-2026-42127","CVE-2026-42211","CVE-2026-42342","CVE-2026-4360","CVE-2026-44431","CVE-2026-44990","CVE-2026-45409","CVE-2026-4786","CVE-2026-49825","CVE-2026-49853","CVE-2026-49854","CVE-2026-49855","CVE-2026-53606","CVE-2026-56852","CVE-2026-6019","CVE-2026-6100","CVE-2026-6357","CVE-2026-7210","CVE-2026-73501","CVE-2026-7774","CVE-2026-8328","CVE-2026-8595","CVE-2026-8609","CVE-2026-8643","CVE-2026-9029"]},{"id":"RHSA-2026:42146","title":"Red Hat Security Advisory: Red Hat Quay 3.12.20","vulnerabilityIds":["CVE-2026-12143","CVE-2026-32591","CVE-2026-39820","CVE-2026-39821","CVE-2026-39828","CVE-2026-39829","CVE-2026-39830","CVE-2026-39832","CVE-2026-39835","CVE-2026-42151","CVE-2026-42154","CVE-2026-42499","CVE-2026-42508","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44990","CVE-2026-45822","CVE-2026-46597"]},{"id":"SUSE-SU-2026:4606-1","title":"Security update for golang-github-prometheus-prometheus","vulnerabilityIds":["CVE-2023-45289","CVE-2025-4673","CVE-2025-61686","CVE-2026-2303","CVE-2026-39821","CVE-2026-40181","CVE-2026-42211","CVE-2026-42342","CVE-2026-44990","CVE-2026-53606","CVE-2026-56852"]},{"id":"RHSA-2026:40262","title":"Red Hat Security Advisory: Red Hat Quay 3.9.24","vulnerabilityIds":["CVE-2026-12143","CVE-2026-13676","CVE-2026-32591","CVE-2026-39820","CVE-2026-39821","CVE-2026-39828","CVE-2026-39829","CVE-2026-39830","CVE-2026-39831","CVE-2026-39832","CVE-2026-39835","CVE-2026-42151","CVE-2026-42154","CVE-2026-42499","CVE-2026-42508","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44990","CVE-2026-45822","CVE-2026-46597"]},{"id":"RHSA-2026:59593","title":"Red Hat Security Advisory: multicluster engine for Kubernetes v2.17.2 security update","vulnerabilityIds":["CVE-2026-13676","CVE-2026-19130","CVE-2026-27145","CVE-2026-39829","CVE-2026-39835","CVE-2026-44740","CVE-2026-44990","CVE-2026-45623","CVE-2026-47219","CVE-2026-54272","CVE-2026-59869","CVE-2026-66794","CVE-2026-66795","CVE-2026-66804","CVE-2026-66805","CVE-2026-66808","CVE-2026-67213","CVE-2026-67214","CVE-2026-69153","CVE-2026-69192","CVE-2026-73086","CVE-2026-73266","CVE-2026-73267","CVE-2026-73268","CVE-2026-73269"]},{"id":"RHSA-2026:47451","title":"Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.15.4 security update","vulnerabilityIds":["CVE-2025-61726","CVE-2026-25681","CVE-2026-27136","CVE-2026-39828","CVE-2026-39829","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-44740","CVE-2026-44990","CVE-2026-53488","CVE-2026-59869"]},{"id":"RHSA-2026:82813","title":"Red Hat Security Advisory: OpenShift Container Platform 4.15.70 bug fix and security update","vulnerabilityIds":["CVE-2025-65637","CVE-2026-33814","CVE-2026-39829","CVE-2026-39830","CVE-2026-39831","CVE-2026-39832","CVE-2026-44918","CVE-2026-44990","CVE-2026-46597","CVE-2026-49329","CVE-2026-59869","CVE-2026-66138","CVE-2026-75885","CVE-2026-75887","CVE-2026-75888","CVE-2026-83589","CVE-2026-93017"]},{"id":"RHSA-2026:41066","title":"Red Hat Security Advisory: Red Hat Quay 3.16.5","vulnerabilityIds":["CVE-2026-6322","CVE-2026-9277","CVE-2026-10143","CVE-2026-12143","CVE-2026-13676","CVE-2026-32281","CVE-2026-32591","CVE-2026-39820","CVE-2026-39821","CVE-2026-39828","CVE-2026-39829","CVE-2026-39830","CVE-2026-39831","CVE-2026-39832","CVE-2026-39835","CVE-2026-42044","CVE-2026-42151","CVE-2026-42154","CVE-2026-42499","CVE-2026-42504","CVE-2026-42508","CVE-2026-44432","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-44990","CVE-2026-45822","CVE-2026-46597","CVE-2026-48526"]},{"id":"RHSA-2026:47735","title":"Red Hat Security Advisory: multicluster engine for Kubernetes v2.8.9 security 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3.17.4","vulnerabilityIds":["CVE-2026-6322","CVE-2026-9277","CVE-2026-10143","CVE-2026-12143","CVE-2026-13149","CVE-2026-13676","CVE-2026-15927","CVE-2026-39821","CVE-2026-39828","CVE-2026-39829","CVE-2026-39830","CVE-2026-39831","CVE-2026-39832","CVE-2026-39835","CVE-2026-42508","CVE-2026-44432","CVE-2026-44990","CVE-2026-46597","CVE-2026-54058","CVE-2026-54060","CVE-2026-55379","CVE-2026-55380","CVE-2026-57231","CVE-2026-59197","CVE-2026-59199","CVE-2026-59200","CVE-2026-59204","CVE-2026-59205","CVE-2026-59869","CVE-2026-59885","CVE-2026-59886","CVE-2026-73086"]},{"id":"RHSA-2026:41031","title":"Red Hat Security Advisory: Red Hat Quay 3.10.24","vulnerabilityIds":["CVE-2026-12143","CVE-2026-32591","CVE-2026-39820","CVE-2026-39821","CVE-2026-39828","CVE-2026-39829","CVE-2026-39830","CVE-2026-39831","CVE-2026-39832","CVE-2026-39835","CVE-2026-42151","CVE-2026-42154","CVE-2026-42499","CVE-2026-42508","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44990","CVE-2026-45822","CVE-2026-46597"]},{"id":"RHSA-2026:57191","title":"Red Hat Security Advisory: Red Hat Advanced Cluster Management for Kubernetes v2.16.3 security 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security update","vulnerabilityIds":["CVE-2026-27136","CVE-2026-27145","CVE-2026-39821","CVE-2026-42508","CVE-2026-44740","CVE-2026-44990","CVE-2026-45447","CVE-2026-46595","CVE-2026-50151","CVE-2026-53488","CVE-2026-59869"]},{"id":"RHSA-2026:70587","title":"Red Hat Security Advisory: OpenShift Container Platform 4.17.58 bug fix and security update","vulnerabilityIds":["CVE-2026-14362","CVE-2026-33814","CVE-2026-33818","CVE-2026-42504","CVE-2026-42965","CVE-2026-43003","CVE-2026-44918","CVE-2026-44990","CVE-2026-45623","CVE-2026-46597","CVE-2026-48801","CVE-2026-54284","CVE-2026-54423","CVE-2026-56852","CVE-2026-56858","CVE-2026-56859","CVE-2026-56860","CVE-2026-56862","CVE-2026-59869","CVE-2026-66138","CVE-2026-69153","CVE-2026-75885","CVE-2026-75886","CVE-2026-75887"]},{"id":"RHSA-2026:73869","title":"Red Hat Security Advisory: OpenShift Container Platform 4.14.75 bug fix and security 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update","vulnerabilityIds":["CVE-2026-26996","CVE-2026-33814","CVE-2026-44990","CVE-2026-46597","CVE-2026-59869"]},{"id":"RHSA-2026:41055","title":"Red Hat Security Advisory: multicluster engine for Kubernetes v2.6.12 security update","vulnerabilityIds":["CVE-2026-33811","CVE-2026-39821","CVE-2026-39828","CVE-2026-39829","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-44990"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-36566","identifiers":["EUVD-2026-36566","CVE-2026-44990","GHSA-rpr9-rxv7-x643"]},"retained":false,"historicalAffected":[]},{"revision":"825fe56ced4944f1b52793fc04a4a89e","observedAt":"2026-10-27T11:12:23.45+00:00","statement":{"source":"nvd","id":"CVE-2026-44990","aliases":[],"title":"ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlle…","description":"ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlled content inside a disallowed `xmp` element into live HTML or JavaScript. This is a sanitizer bypass in the default `disallowedTagsMode: 'discard'` path and can lead to stored XSS in applications that render sanitized output back to users. Version 2.17.4 patches the issue.","state":0,"publishedAt":"2026-06-12T21:16:22.447+00:00","modifiedAt":"2026-10-26T11:10:00.157+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","score":8.1,"severity":"HIGH"}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643","https://access.redhat.com/errata/RHSA-2026:36882","https://access.redhat.com/errata/RHSA-2026:36883","https://access.redhat.com/errata/RHSA-2026:40262","https://access.redhat.com/errata/RHSA-2026:41031","https://access.redhat.com/errata/RHSA-2026:41055","https://access.redhat.com/errata/RHSA-2026:41064","https://access.redhat.com/errata/RHSA-2026:41066","https://access.redhat.com/errata/RHSA-2026:42146","https://access.redhat.com/errata/RHSA-2026:42796","https://access.redhat.com/errata/RHSA-2026:43052","https://access.redhat.com/errata/RHSA-2026:46598","https://access.redhat.com/errata/RHSA-2026:46685","https://access.redhat.com/errata/RHSA-2026:46885","https://access.redhat.com/errata/RHSA-2026:46903","https://access.redhat.com/errata/RHSA-2026:47735","https://access.redhat.com/errata/RHSA-2026:47737","https://access.redhat.com/errata/RHSA-2026:48124","https://access.redhat.com/errata/RHSA-2026:51196","https://access.redhat.com/errata/RHSA-2026:51197","https://access.redhat.com/errata/RHSA-2026:51349","https://access.redhat.com/errata/RHSA-2026:57191","https://access.redhat.com/errata/RHSA-2026:57194","https://access.redhat.com/errata/RHSA-2026:59593","https://access.redhat.com/errata/RHSA-2026:60386","https://access.redhat.com/errata/RHSA-2026:60441","https://access.redhat.com/errata/RHSA-2026:63046","https://access.redhat.com/errata/RHSA-2026:63103","https://access.redhat.com/security/cve/CVE-2026-44990","https://bugzilla.redhat.com/show_bug.cgi?id=2488565","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44990.json"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44990","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-79"],"productCriteria":[],"sourceDates":{"published":"2026-06-12T21:16:22.447","lastModified":"2026-10-26T11:10:00.157"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-44990","identifiers":["CVE-2026-44990"]},"retained":false,"historicalAffected":[]},{"revision":"d6886caa07284e26a0213ac9cac12e2b","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-rpr9-rxv7-x643","aliases":["CVE-2026-44990"],"title":"Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`","description":"### Summary\nUnder the default configuration, `sanitize-html` can turn attacker-controlled content inside a disallowed `xmp` element into live HTML or JavaScript. This is a sanitizer bypass in the default `disallowedTagsMode: 'discard'` path and can lead to stored XSS in applications that render sanitized output back to users.\n\n### Details\nIn `sanitize-html@2.17.3`, the default `nonTextTags` list includes only `script`, `style`, `textarea`, and `option` in `index.js` lines 138-142. That means disallowed `xmp` tags are not treated as \"drop the entire contents\" tags.\n\nLater, in the `ontext` handler at `index.js` lines 569-577, the code special-cases `textarea` and `xmp` and appends their text content directly to the output without escaping:\n\n```js\n} else if ((options.disallowedTagsMode === 'discard' || options.disallowedTagsMode === 'completelyDiscard') && (tag === 'textarea' || tag === 'xmp')) {\n  result += text;\n}\n```\n\nBecause `htmlparser2` treats `xmp` as a raw-text element, markup inside `xmp` is parsed as text on input but becomes live markup again once it is appended unescaped to the sanitized output.\n\nThis creates a default sanitizer bypass. For example, a disallowed `<xmp>` wrapper can be used to smuggle `<script>` or event-handler payloads through sanitization.\n\nThe README also appears to contradict the implementation. In the \"Discarding the entire contents of a disallowed tag\" section, the documented exception list names only `style`, `script`, `textarea`, and `option`, and does not mention `xmp`.\n\n### PoC\nTested locally against `sanitize-html@2.17.3` on Node.js `v25.2.1`.\n\n1. Install the package:\n\n```bash\nnpm install sanitize-html\n```\n\n2. Run the following script:\n\n```js\nconst sanitizeHtml = require('sanitize-html');\n\nconsole.log(sanitizeHtml('<xmp><script>alert(1)</script></xmp>'));\nconsole.log(sanitizeHtml('<xmp><img src=x onerror=alert(1)></xmp>'));\nconsole.log(sanitizeHtml('<xmp><svg><script>alert(1)</script></svg></xmp>'));\n```\n\n3. Observed output:\n\n```html\n<script>alert(1)</script>\n<img src=x onerror=alert(1)>\n<svg><script>alert(1)</script></svg>\n```\n\n4. Render any of the returned strings in a browser context that trusts `sanitize-html` output, for example:\n\n```js\nconst dirty = '<xmp><script>alert(1)</script></xmp>';\nconst clean = sanitizeHtml(dirty);\n```\n\nIf `clean` is inserted into the DOM or stored and later rendered as trusted HTML, the attacker-controlled script executes.\n\n### Impact\nThis is a cross-site scripting vulnerability in the default sanitizer behavior. Any application that uses `sanitize-html` defaults and then renders the returned HTML as trusted output is impacted. A remote attacker who can submit HTML content can trigger execution of arbitrary JavaScript in another user's browser when that content is viewed.","state":0,"publishedAt":"2026-05-14T18:26:27+00:00","modifiedAt":"2026-06-12T22:15:09.9049409+00:00","affected":[{"ecosystem":"npm","name":"sanitize-html","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.17.3"},{"kind":"fixed","version":"2.17.4"}]}],"versions":["2.17.3"],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"CRITICAL"}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643","https://nvd.nist.gov/vuln/detail/CVE-2026-44990","https://github.com/apostrophecms/apostrophe/issues/5418","https://github.com/apostrophecms/apostrophe/commit/8d4c882b4ed3a7ce802cd87f89f0c1cb7482b8c2","https://github.com/apostrophecms/apostrophe"],"sourceUrl":"https://github.com/advisories/GHSA-rpr9-rxv7-x643","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-rpr9-rxv7-x643","identifiers":["GHSA-rpr9-rxv7-x643","CVE-2026-44990"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-07T19:07:25.1127279+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-07T19:07:25.1127279+00:00","lastSuccessAt":"2026-11-07T19:07:25.259395+00:00","error":null,"lastVerifiedAt":"2026-11-07T19:07:25.259396+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-bb5c9d5a08063ef076042e33dd72a7d0ffa4c4487efdcf3106e29ba55ec2ad57-0f6819d30115900023f4b20f99e508641b2007efdd91dc0cdc8e3f4191d4d221","complete":true,"records":420942,"lastAttemptAt":"2026-11-07T19:07:24.5330127+00:00","lastSuccessAt":"2026-11-07T19:07:24.4427471+00:00","error":null,"lastVerifiedAt":"2026-11-07T19:07:24.5330127+00:00","snapshotPublishedAt":"2026-11-07T18:20:15+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-05809410d082491a9e6eb58bff15758d","complete":true,"records":13633,"lastAttemptAt":"2026-11-07T19:19:28.6430553+00:00","lastSuccessAt":"2026-11-07T19:19:28.637+00:00","error":null,"lastVerifiedAt":"2026-11-07T19:19:28.637+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-07T19:07:25.1127279+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-07T19:07:25.1127279+00:00","lastSuccessAt":"2026-11-07T19:07:25.2602906+00:00","error":null,"lastVerifiedAt":"2026-11-07T19:07:25.2602909+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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