{"cve":"CVE-2026-84371","nvd":{"published":"2026-09-01T21:18:48.357","modified":"2026-09-09T21:09:13.080","status":"Deferred","description":"ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. From version 1.9.0 until version 2.17.7, packages/sanitize-html/index.js validates an animation value attribute as one flat URL and does not recognize that attributeName selecting href or xlink:href gives the sibling values, from, to, or by attribute SVG SMIL URL semantics. In configurations that allow the animate, animateColor, animateMotion, animateTransform, or set elements, a values list can begin with a safe fragment and contain a later executable destination that survives allowedSchemesAppliedToAttributes checking. When the sanitized SVG is rendered, the browser can copy that later destination into the live link, and a victim who activates the link can execute script in the application's origin. This issue is fixed in version 2.17.7.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4},"cwes":["CWE-79"],"references":["https://github.com/apostrophecms/apostrophe/blob/main/packages/sanitize-html/CHANGELOG.md","https://github.com/apostrophecms/apostrophe/commit/1135516a1a4a8f9638641c460488a43d8af20081","https://github.com/apostrophecms/apostrophe/commit/38ff1106c8176b16c2da9872acd9b449adcbb949","https://github.com/apostrophecms/apostrophe/pull/5552","https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-g8qq-57p8-ggw5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-84371","score":0.00298,"percentile":0.22554,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-g8qq-57p8-ggw5","url":"https://osv.dev/vulnerability/GHSA-g8qq-57p8-ggw5","summary":"ApostropheCMS: Stored XSS via SVG SMIL URI-list scheme-policy bypass","modified":"2026-09-10T03:50:54.463184410Z","packages":[{"ecosystem":"npm","name":"sanitize-html","purl":"pkg:npm/sanitize-html","ranges":[">=1.9.0 <2.17.7"],"fixed":["2.17.7"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}