medium6.5
CVE-2026-33355
Discourse is an open-source discussion platform.
Impact
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the `/private-posts` endpoint did not apply post-type visibility filtering, allowing regular PM participants to see whisper posts in PM topics they had access to. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Discourse | Discourse | from 2026.1.0 before 2026.1.2 from 2026.2.0 before 2026.2.1 Version 2026.3.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/discourse/discourse/commit/84e5865a279716c6866e8c0648d1d8b42320603c
- https://github.com/discourse/discourse/commit/d25b8ee9ee182dbb34e92b34e39878ce4d59bcdc
- https://github.com/discourse/discourse/commit/d2f317271ad7638f1e2791905472ebd9370946d1
- https://github.com/discourse/discourse/security/advisories/GHSA-g4v5-6gfp-3hjq