CVE-2026-55424Discourse is an open-source discussion platform.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.4 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
discourse discourse discourse:discourse | from 2026.1.0 before 2026.1.5; from 2026.4.0 before 2026.4.2; from 2026.5.0 before 2026.5.1; 2026.6.0 | NVD |
References
- https://github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59patch
- https://github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242cpatch
- https://github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83patch
- https://github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5patch
- 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-695w-7fv8-mxg3vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.