CVE-2026-84371

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.

• CWE-79

• 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

Published

Sep 1, 2026

Last Modified

Sep 9, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-84365Hono is a Web application framework that provides support fo…6.5
• CVE-2026-84366Scrapy is a high-level web crawling and scraping framework f…7.4
• CVE-2026-84367joi is a schema description language and data validator for …3.7
• CVE-2026-84368joi is a schema description language and data validator for …3.7
• CVE-2026-84369SVGO, short for SVG Optimizer, is a Node.js library and comm…6.1
• CVE-2026-84370SVGO, short for SVG Optimizer, is a Node.js library and comm…8.2
• CVE-2026-84372Predis is a flexible and feature-complete Redis and Valkey c…9.8
• CVE-2026-84373Vitest is a testing framework powered by Vite. From 2.1.0 un…5.9
• CVE-2026-84374Laravel Excel provides supercharged Excel exports and import…7.5
• CVE-2026-84375js-yaml is a JavaScript YAML parser and dumper. From 3.0.0 u…7.5
• CVE-2026-84376Astro is a web framework for content-driven websites. Prior …6.3
• CVE-2026-84377LiteLLM is a proxy server (AI Gateway) to call LLM APIs in O…6.5