CVE-2026-43887 — Outline: Stored XSS via Comment Mentions
Outline is a service that allows for collaborative documentation. From 0.84.0 to 1.6.1, the Outline comment section permits users to mention other users; however, the backend do…
Published: 2026-05-11 · CVSS: 7.3 · CVSS 3.1
Outline is a service that allows for collaborative documentation. From 0.84.0 to 1.6.1, the Outline comment section permits users to mention other users; however, the backend does not validate or sanitize the href attribute associated with these mentions. As a result, potentially dangerous protocols (e.g., javascript:) are not filtered, introducing a risk of client-side code execution. This vulnerability is fixed in 1.7.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7