Description
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, insufficient SVG sanitization in upload and user avatar handling could lead to cross-site scripting when a user visited specific URLs that are not normally part of community browsing. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
discourse discourse
>= 2026.1.0-latest, < 2026.1.5affected>= 2026.4.0-latest, < 2026.4.2affected>= 2026.5.0-latest, < 2026.5.1affected
References
- https://github.com/discourse/discourse/security/advisories/GHSA-jmcf-3367-78vv ↗
- https://github.com/discourse/discourse/commit/3ee8343cd7f00d59d8513bee0a12e02d50bfc358 ↗
- https://github.com/discourse/discourse/commit/810c2715799fd08b06fd6ffc664d9562fe9ea6ff ↗
- https://github.com/discourse/discourse/commit/92a699d89b84685b6fdd63cd0d0e371793c69dad ↗
- https://github.com/discourse/discourse/commit/b8ceb49f4ba52257be30eb3c2ce51a5bf03be5fe ↗
- https://github.com/discourse/discourse/releases/tag/v2026.1.5 ↗
- https://github.com/discourse/discourse/releases/tag/v2026.4.2 ↗
- https://github.com/discourse/discourse/releases/tag/v2026.5.1 ↗
- https://github.com/discourse/discourse/releases/tag/v2026.6.0 ↗