CVE-2026-128069

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Before 1.7.2, the HTML4 and HTML5 variants of Rails::HTML::SafeListSanitizer reuse one Rails::HTML::PermitScrubber across calls and mutate its tags and attributes without synchronization. In a multithreaded process, concurrent sanitize calls using different tags: or attributes: options can interleave and cause one call to use the other call's allowlist. If a permissive call admits a script element or event-handler attribute, output expected to be sanitized under a stricter policy can retain it and cause cross-site scripting when rendered. Applications that are single-threaded, use one identical allowlist everywhere, or provide a separate scrubber: are not affected. This issue is fixed in version 1.7.2.

• CWE-79
• CWE-362

• https://github.com/rails/rails-html-sanitizer/commit/15f764c3563d5dd9b97ad32eaa7454577ccec4b9
• https://github.com/rails/rails-html-sanitizer/issues/228
• https://github.com/rails/rails-html-sanitizer/releases/tag/v1.7.2
• https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-h7wh-q2qr-458c

Published

Nov 13, 2026

Last Modified

Nov 13, 2026

Status

Received

• 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-2026-128053OpenMage magento-lts before 20.18.2 and 21.0.0-beta1 before …4.7
• CVE-2026-12806A vulnerability has been found in Edimax BR-6478AC V2 1.23. …8.8
• CVE-2026-128065@grpc/grpc-js implements the core functionality of gRPC pure…6.9
• CVE-2026-128066Pillow is a Python imaging library. From 1.0 through 12.3.0,…8.7
• CVE-2026-128067Pillow is a Python imaging library. From 2.3.0 through 12.3.…8.4
• CVE-2026-128068rails-html-sanitizer is responsible for sanitizing HTML frag…5.3
• CVE-2026-12807A vulnerability was found in Edimax BR-6478AC V2 1.23. This …6.3
• CVE-2026-128070Nuxt is an open-source web development framework for Vue.js.…5.9
• CVE-2026-128071Nuxt is an open-source web development framework for Vue.js.…6.5
• CVE-2026-128072Nuxt is an open-source web development framework for Vue.js.…3.1
• CVE-2026-128074Nuxt is an open-source web development framework for Vue.js.…6.9
• CVE-2026-128075Nuxt is an open-source web development framework for Vue.js.…5.3