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CVE PROGRAM SOURCE RECORD4.2 Medium

CVE-2026-84302

Discourse: Non-participant moderators can read, edit, and delete PM content through Discourse AI reviewables

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, Discourse AI reviewables associated with private messages could appear in the moderator review queue of a moderator who was not a participant in the message. Reviewable visibility filtering did not restrict private-message reviewables to the audience permitted to access the underlying private-message topic, allowing the moderator to read otherwise confidential content. Depending on the available reviewable action, the moderator could also modify the private message by closing its topic or deleting a post. Exploitation requires an authenticated moderator account and a pre-existing Discourse AI reviewable associated with a private message. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

discourse discourse

  • < 2026.7.0affected
  • >= 2026.6.0-latest, < 2026.6.1affected
  • >= 2026.5.0-latest, < 2026.5.2affected
  • >= 2026.1.0-latest, < 2026.1.6affected

References