CVE-2026-30891 MEDIUM

CVE-2026-30891: Discourse hasUnauthorized Exposure of Private User Action Types

Vendor Discourse
Product discourse
Weakness CWE-200 · Info exposure
Published March 20, 2026
Last update March 20, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 20, 2026 CVE published
March 20, 2026 Record updated