CVE-2026-33355

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.

Score

CVSS 3.1 6.5 Medium

Status

Analyzed - security-advisories@github.com

Published

2026-03-19

Last modified

2026-03-20

Weaknesses

CWE-200

Affected products

• Discourse (Discourse)

References

• 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