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Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an attacker can grant access to a private message topic through invites even after they lose access to that PM. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

PUBLISHED Reserved 2026-03-19 | Published 2026-03-20 | Updated 2026-03-25 | Assigner GitHub_M




MEDIUM: 5.9CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L

Problem types

CWE-863: Incorrect Authorization

Product status

>= 2026.1.0-latest, < 2026.1.2
affected

>= 2026.2.0-latest, < 2026.2.1
affected

= 2026.3.0-latest
affected

References

github.com/...course/security/advisories/GHSA-hgcp-p7hq-cwxw

cve.org (CVE-2026-33424)

nvd.nist.gov (CVE-2026-33424)

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