CVE-2026-30891

Summary

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a user could access another user's private activity due to insufficient authorization checks in the user actions endpoint. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch.

Affected Software

VendorProductVersion RangeStatus
discoursediscourse>= 2026.1.0-latest, < 2026.1.2affected
discoursediscourse>= 2026.2.0-latest, < 2026.2.1affected
discoursediscourse= 2026.3.0-latest.1affected

Weaknesses

  • CWE-200: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References