Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Discourse | Discourse | >= 2026.1.0, < 2026.1.5 |
Related Weaknesses (CWE)
References
- https://github.com/discourse/discourse/commit/3ee8343cd7f00d59d8513bee0a12e02d50Patch
- https://github.com/discourse/discourse/commit/810c2715799fd08b06fd6ffc664d9562fePatch
- https://github.com/discourse/discourse/commit/92a699d89b84685b6fdd63cd0d0e371793Patch
- https://github.com/discourse/discourse/commit/b8ceb49f4ba52257be30eb3c2ce51a5bf0Patch
- https://github.com/discourse/discourse/releases/tag/v2026.1.5Release Notes
- https://github.com/discourse/discourse/releases/tag/v2026.4.2Release Notes
- https://github.com/discourse/discourse/releases/tag/v2026.5.1Release Notes
- https://github.com/discourse/discourse/releases/tag/v2026.6.0Release Notes
- https://github.com/discourse/discourse/security/advisories/GHSA-jmcf-3367-78vvVendor Advisory
FAQ
What is CVE-2026-53962?
CVE-2026-53962 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 scriptin...
How severe is CVE-2026-53962?
CVE-2026-53962 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53962?
Check the references section above for vendor advisories and patch information. Affected products include: Discourse Discourse.