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CVE-2026-84302

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

Description (CNA)

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 (CNA)

Vendor / productVersions
discourse / discourseaffected < 2026.7.0; affected >= 2026.6.0-latest, < 2026.6.1; affected >= 2026.5.0-latest, < 2026.5.2; affected >= 2026.1.0-latest, < 2026.1.6

CWE

CWE-862

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.