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 and secure categories to moderators who shouldn't have access. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Vulnerability class: Information Disclosure
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (38.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.001
Affected products
- Discourse — versions = 2026.3.0-latest, >= 2026.2.0-latest, < 2026.2.1, >= 2026.1.0-latest, < 2026.1.2
Weakness classification (CWE)
References
- github.com/discourse/discourse/security/advisories/GHSA-wxvr-pm5c-829p (Vendor Advisory)
- github.com/discourse/discourse/commit/3bf3793a708662716c0a4eaf64ae091abe71ab4c (Patch)
- github.com/discourse/discourse/commit/473288219e93cd17576cf15e4f0b9e388a31d0c1 (Patch)
- github.com/discourse/discourse/commit/62721429d4402505d21280bcbe5894032447d800 (Patch)
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.