Information disclosure in Discourse
CVE-2026-33394
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the Post Edits admin report (/admin/reports/post_edits) leaked the first 40 characters of raw post content from private messages…
Vulnerability class: Information Disclosure
EPSS: 0.000 (15.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Discourse — versions >= 2026.1.0-latest, < 2026.1.2, >= 2026.2.0-latest, < 2026.2.1, = 2026.3.0-latest
Weakness classification (CWE)
References
- https://github.com/discourse/discourse/security/advisories/GHSA-wxvr-pm5c-829p (x_refsource_CONFIRM)
- https://github.com/discourse/discourse/commit/3bf3793a708662716c0a4eaf64ae091abe71ab4c (x_refsource_MISC)
- https://github.com/discourse/discourse/commit/473288219e93cd17576cf15e4f0b9e388a31d0c1 (x_refsource_MISC)
- https://github.com/discourse/discourse/commit/62721429d4402505d21280bcbe5894032447d800 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-33394?
- CVE-2026-33394 is a low-severity vulnerability in Discourse, classified under Information Disclosure. CVSS score: 2.7/10. Published 2026-03-19.
- How severe is CVE-2026-33394?
- Low severity. CVSS v3 base score is 2.7 out of 10.