{"id":"GO-2026-5381","revision":null,"records":[{"revision":"d343795b453048708d3189ac940441d9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44903","aliases":[],"title":"Prometheus: Stored XSS via crafted histogram bucket label values in the heatmap display of the old Prometheus web UI","description":"Prometheus is an open-source monitoring system and time series database. From 2.49.0 to before 3.5.3 and 3.11.3, in the Prometheus server's legacy web UI (enabled via the command-line flag --enable-feature=old-ui), the histogram heatmap chart view does not escape le label values when inserting them into the HTML for use as axis tick mark labels. An attacker who can inject crafted metrics can execute JavaScript in the browser of any Prometheus user who views the metric in the heatmap chart UI. This vulnerability is fixed in 3.5.3 and 3.11.3.","state":0,"publishedAt":"2026-05-26T21:27:18.597+00:00","modifiedAt":"2026-05-27T14:20:35.919+00:00","affected":[{"ecosystem":"Vendor product","name":"prometheus","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"prometheus\",\n                    \"product\": \"prometheus\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 2.49.0, < 3.5.3\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 3.6.0-rc.0, < 3.11.3\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":5.1,"severity":"MEDIUM"}],"references":["https://github.com/prometheus/prometheus/security/advisories/GHSA-fw8g-cg8f-9j28","https://github.com/prometheus/prometheus/commit/38f23b9075ced1de2b82d2dad8b2bebb1ecd5b7d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44903","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44903","identifiers":["CVE-2026-44903"]},"retained":false,"historicalAffected":[]},{"revision":"e8ef55cb27cc437094980d725b5f1446","observedAt":"2026-11-15T14:01:43.923+00:00","statement":{"source":"euvd","id":"EUVD-2026-32008","aliases":["CVE-2026-44903","GHSA-fw8g-cg8f-9j28"],"title":"Prometheus is an open-source monitoring system and time series database. From 2.49.0 to before 3.5.3 and 3.11.3, in the Prometheus server's legacy web UI (enabled via the command-line flag --enable-feature=old-ui), the histogram heatmap cha…","description":"Prometheus is an open-source monitoring system and time series database. From 2.49.0 to before 3.5.3 and 3.11.3, in the Prometheus server's legacy web UI (enabled via the command-line flag --enable-feature=old-ui), the histogram heatmap chart view does not escape le label values when inserting them into the HTML for use as axis tick mark labels. An attacker who can inject crafted metrics can execute JavaScript in the browser of any Prometheus user who views the metric in the heatmap chart UI. This vulnerability is fixed in 3.5.3 and 3.11.3.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":5.1,"severity":null}],"references":["https://github.com/prometheus/prometheus/security/advisories/GHSA-fw8g-cg8f-9j28","https://github.com/prometheus/prometheus/commit/38f23b9075ced1de2b82d2dad8b2bebb1ecd5b7d"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-32008","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 26, 2026, 9:27:18 PM","dateUpdated":"May 27, 2026, 2:20:35 PM"},"relatedAdvisories":[{"id":"WID-SEC-W-2026-1292","title":"Prometheus: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2026-42151","CVE-2026-42154","CVE-2026-44903"]}],"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-2026-32008","identifiers":["EUVD-2026-32008","CVE-2026-44903","GHSA-fw8g-cg8f-9j28"]},"retained":false,"historicalAffected":[]},{"revision":"4db5f8a1e9e846fd9b315ab47664bc88","observedAt":"2026-10-25T10:17:27.754+00:00","statement":{"source":"nvd","id":"CVE-2026-44903","aliases":[],"title":"Prometheus is an open-source monitoring system and time series database. From 2.49.0 to before 3.5.3 and 3.11.3, in the Prometheus server's legacy web UI (enabled via the command-line flag --enable-feature=old-ui), the histogram heatmap cha…","description":"Prometheus is an open-source monitoring system and time series database. From 2.49.0 to before 3.5.3 and 3.11.3, in the Prometheus server's legacy web UI (enabled via the command-line flag --enable-feature=old-ui), the histogram heatmap chart view does not escape le label values when inserting them into the HTML for use as axis tick mark labels. An attacker who can inject crafted metrics can execute JavaScript in the browser of any Prometheus user who views the metric in the heatmap chart UI. This vulnerability is fixed in 3.5.3 and 3.11.3.","state":0,"publishedAt":"2026-05-26T22:16:43.01+00:00","modifiedAt":"2026-07-24T12:10:00.21+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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","score":5.1,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1,"severity":"MEDIUM"}],"references":["https://github.com/prometheus/prometheus/commit/38f23b9075ced1de2b82d2dad8b2bebb1ecd5b7d","https://github.com/prometheus/prometheus/security/advisories/GHSA-fw8g-cg8f-9j28"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44903","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-79"],"productCriteria":["cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-05-26T22:16:43.010","lastModified":"2026-07-24T12:10:00.210"},"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-2026-44903","identifiers":["CVE-2026-44903"]},"retained":false,"historicalAffected":[]},{"revision":"810c9dd9f7444caa9ec694b54263164c","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-fw8g-cg8f-9j28","aliases":["BIT-prometheus-2026-44903","CVE-2026-44903","GO-2026-5381"],"title":"Prometheus vulnerable to stored XSS via crafted histogram bucket label values in the old web UI heatmap display","description":"### Impact\n\nIn the Prometheus server's legacy web UI (enabled via the command-line flag `--enable-feature=old-ui`), the histogram heatmap chart view does not escape `le` label values when inserting them into the HTML for use as axis tick mark labels.\n\nAn attacker who can inject crafted metrics (e.g. via a compromised scrape target, remote write, or OTLP receiver endpoint) can execute JavaScript in the browser of any Prometheus user who views the metric in the heatmap chart UI. From the XSS context, an attacker could for example:\n\n- Read `/api/v1/status/config` to extract sensitive configuration (although credentials / secrets are redacted by the server)\n- Call `/-/quit` to shut down Prometheus (only if `--web.enable-lifecycle` is set)\n- Call `/api/v1/admin/tsdb/delete_series` to delete data (only if `--web.enable-admin-api` is set)\n- Exfiltrate metric data to an external server\n\nNote that this only affects users who have explicitly enabled the legacy Prometheus web UI using the `--enable-feature=old-ui` command-line flag.\n\n### Patches\n\nhttps://github.com/prometheus/prometheus/commit/38f23b9075ced1de2b82d2dad8b2bebb1ecd5b7d\n\n### Workarounds\n\nIf at all possible, disable the legacy web UI by removing the `--enable-feature=old-ui` command-line flag).\n\nIf this is not an option, take the following precautions:\n\n- If using the remote write receiver (`--web.enable-remote-write-receiver`), ensure it is not exposed to untrusted sources.\n- If using the OTLP receiver (`--web.enable-otlp-receiver`), ensure it is not exposed to untrusted sources.\n- Ensure scrape targets are trusted and not under attacker control.\n- Do not enable admin / mutating API endpoints (e.g. `--web.enable-admin-api` or `web.enable-lifecycle`) in cases where you cannot prevent untrusted data from being ingested.\n- Users should avoid clicking untrusted links, especially those containing functions such as `label_replace`, as they may generate poisoned label names and values.\n\n### References\n\n- CVE-2019-10215 — prior stored DOM XSS vulnerability in Prometheus query history, fixed in v2.7.2\n- CVE-2026-40179 — prior stored DOM XSS vulnerability in Prometheus web UI (hover tooltips and metrics explorer), fixed in v3.11.2","state":0,"publishedAt":"2026-05-05T21:53:18+00:00","modifiedAt":"2026-09-10T03:51:05.5501812+00:00","affected":[{"ecosystem":"Go","name":"github.com/prometheus/prometheus","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.311.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":null,"severity":null},{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/prometheus/prometheus/security/advisories/GHSA-fw8g-cg8f-9j28","https://nvd.nist.gov/vuln/detail/CVE-2026-44903","https://github.com/prometheus/prometheus/commit/38f23b9075ced1de2b82d2dad8b2bebb1ecd5b7d","https://github.com/prometheus/prometheus"],"sourceUrl":"https://github.com/advisories/GHSA-fw8g-cg8f-9j28","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-fw8g-cg8f-9j28","identifiers":["GHSA-fw8g-cg8f-9j28","BIT-prometheus-2026-44903","CVE-2026-44903","GO-2026-5381"]},"retained":false,"historicalAffected":[]},{"revision":"b78f1a34a2ea4199afd81de1666b8865","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5381","aliases":["BIT-prometheus-2026-44903","CVE-2026-44903","GHSA-fw8g-cg8f-9j28"],"title":"Prometheus vulnerable to stored XSS via crafted histogram bucket label values in the old web UI heatmap display in github.com/prometheus/prometheus","description":"Prometheus vulnerable to stored XSS via crafted histogram bucket label values in the old web UI heatmap display in github.com/prometheus/prometheus","state":0,"publishedAt":"2026-06-25T18:43:19+00:00","modifiedAt":"2026-06-27T18:29:24.4853475+00:00","affected":[{"ecosystem":"Go","name":"github.com/prometheus/prometheus","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.311.3"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/prometheus/prometheus/security/advisories/GHSA-fw8g-cg8f-9j28","https://nvd.nist.gov/vuln/detail/CVE-2026-44903","https://github.com/prometheus/prometheus/commit/38f23b9075ced1de2b82d2dad8b2bebb1ecd5b7d"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5381","license":"OSV · upstream source license applies","key":"osv:GO-2026-5381","identifiers":["GO-2026-5381","BIT-prometheus-2026-44903","CVE-2026-44903","GHSA-fw8g-cg8f-9j28"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-15T23:06:17.8993558+00:00","complete":true,"records":1781,"lastAttemptAt":"2026-11-15T23:06:17.8993558+00:00","lastSuccessAt":"2026-11-15T23:06:18.1032742+00:00","error":null,"lastVerifiedAt":"2026-11-15T23:06:18.1032749+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-7de4d7559a5263003f03d9f70577ab06f92ba4178309f26fce53e22a4a959294-39ebbce2db83696403d232c43a03ba55a47d1e19101fb621bbb1e57f01bae099","complete":true,"records":425869,"lastAttemptAt":"2026-11-15T23:06:17.3240958+00:00","lastSuccessAt":"2026-11-15T23:06:17.2976675+00:00","error":null,"lastVerifiedAt":"2026-11-15T23:06:17.3240958+00:00","snapshotPublishedAt":"2026-11-15T22:27:42+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-1f00a6164e4d4eb5b570181d2d48c31d","complete":false,"records":13821,"lastAttemptAt":"2026-11-15T23:16:09.5280366+00:00","lastSuccessAt":"2026-11-15T23:16:09.517+00:00","error":"50 identifier lookups failed; latest failures include AccessDenied (HTTP 403). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-15T23:16:09.517+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13688,"expectedIdentifiers":13874,"failedIdentifiers":50},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-15T23:06:17.8993558+00:00","complete":true,"records":1125,"lastAttemptAt":"2026-11-15T23:06:17.8993558+00:00","lastSuccessAt":"2026-11-15T23:06:18.1046693+00:00","error":null,"lastVerifiedAt":"2026-11-15T23:06:18.1046697+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. No reader inventory is sent.","generation":"enrichment-41e8388e19074c0d9ced98f4bd388802","complete":true,"records":13833,"lastAttemptAt":"2026-11-15T23:07:00.0091971+00:00","lastSuccessAt":"2026-11-15T23:07:00.006+00:00","error":null,"lastVerifiedAt":"2026-11-15T23:07:00.006+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13874,"expectedIdentifiers":13874,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-64eea06dbd27de8464d5dbce1b78cc794cc59e2d901516ae0d3ea76e624cdae0","complete":true,"records":9955,"lastAttemptAt":"2026-11-15T23:06:17.7078343+00:00","lastSuccessAt":"2026-11-14T13:57:23.1208135+00:00","error":null,"lastVerifiedAt":"2026-11-15T23:06:17.7078343+00:00","snapshotPublishedAt":"2026-11-14T13:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-f4424d7d4861b1af1404bd15abcb83f295dcd003412a9340ca99dc8200aa148a","complete":true,"records":2014,"lastAttemptAt":"2026-11-15T23:06:17.4961704+00:00","lastSuccessAt":"2026-11-13T19:57:08.2864435+00:00","error":null,"lastVerifiedAt":"2026-11-15T23:06:17.4961704+00:00","snapshotPublishedAt":"2026-11-13T19:33:10+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-6086d649bcb454cdf302d7d9275177bda73550e1b6e446b3520e9b6266d3582c","complete":true,"records":3148,"lastAttemptAt":"2026-11-15T23:06:17.8235923+00:00","lastSuccessAt":"2026-11-15T11:05:17.1034234+00:00","error":null,"lastVerifiedAt":"2026-11-15T23:06:17.8235923+00:00","snapshotPublishedAt":"2026-11-15T10:03:04+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-ff18f36f13fcca3a20a3fb9274b59b8872d18869a99071730e1e79b625c8f612","complete":true,"records":232475,"lastAttemptAt":"2026-11-15T23:06:17.6038079+00:00","lastSuccessAt":"2026-11-15T11:05:10.4195883+00:00","error":null,"lastVerifiedAt":"2026-11-15T23:06:17.6038079+00:00","snapshotPublishedAt":"2026-11-15T10:33:06+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}