Medium [CVE-2026-73428] Stored Cross-Site Scripting via HTML paste allows arbitrary code execution.
This medium-severity Red Hat Linux advisory covers CVE-2026-73428.
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
A flaw was found in Trix, a what-you-see-is-what-you-get rich text editor. A remote attacker can exploit this stored cross-site scripting (XSS) vulnerability by pasting specially crafted HTML into the editor.
This allows a malicious javascript: Uniform Resource Identifier (URI) to be embedded, which can then execute arbitrary code in the victim's browser when another user renders and clicks the content. No Red Hat products ship a vulnerable version of this component.
Red Hat severity: Moderate — CVSS 4.6 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N). Weakness: CWE-79.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Applications that apply server-side HTML sanitization can neutralize the XSS payload on save, preventing exploitation even on unpatched versions of Trix.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.