PT-2026-26716 · Discourse · Discourse

Published 2026-03-20 · Updated 2026-03-21 · CVE-2026-33428

Mitre

CVSS v4.0

4.9

Medium

AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a non-staff user with elevated group membership could access deleted posts belonging to any user due to an overly broad authorization check on the deleted posts index endpoint. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-33428

Affected Products

Discourse

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-33428 · Security Note
• https://github.com/discourse/discourse/security/advisories/GHSA-frcw-p4mc-x6mp · Note