Medium severity5.4NVD Advisory· Published Jul 9, 2026· Updated Jul 14, 2026
CVE-2026-55424
CVE-2026-55424
Description
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a topic "featured link" was not sufficiently normalized and escaped before being rendered in the topic list, allowing a user who can set a featured link to inject JavaScript when default Content Security Policy protections were modified or disabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
Affected products
4<2026.6.0, <2026.5.1, <2026.4.2, <2026.1.5+ 2 more
- (no CPE)range: <2026.6.0, <2026.5.1, <2026.4.2, <2026.1.5
- cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*range: >=2026.1.0,<2026.1.5
- cpe:2.3:a:discourse:discourse:2026.6.0:*:*:*:latest:*:*:*
Patches
Vulnerability mechanics
References
9- github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59nvdPatch
- github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242cnvdPatch
- github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83nvdPatch
- github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5nvdPatch
- github.com/discourse/discourse/security/advisories/GHSA-695w-7fv8-mxg3nvdVendor Advisory
- github.com/discourse/discourse/releases/tag/v2026.1.5nvdRelease Notes
- github.com/discourse/discourse/releases/tag/v2026.4.2nvdRelease Notes
- github.com/discourse/discourse/releases/tag/v2026.5.1nvdRelease Notes
- github.com/discourse/discourse/releases/tag/v2026.6.0nvdRelease Notes
News mentions
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