CVE-2026-43887 – Outline: Stored XSS via Comment Mentions

CVE ID :CVE-2026-43887

Published : May 11, 2026, 10:22 p.m. | 8 minutes ago

Description :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.

Severity: 7.3 | HIGH

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