CVE-2026-33415

LOW

Discourse: Improper Access Control in discourse-ai Allows Unauthorized Category Content Exposure

Title source: cna

Description

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authenticated moderator-level user could retrieve post content, topic titles, and usernames from categories they were not authorized to view. Insufficient access controls on a sentiment analytics endpoint allowed category permission boundaries to be bypassed. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

References (2)

[X_Refsource_Confirm] https://github.com/discourse/discourse/security/advisories/GHSA-vj5f-gg8m-93xg

[X_Refsource_Misc] https://github.com/discourse/discourse/commit/e1bb146a1fadc863a516fbc26c6277273a025308

View Writeup ZIP pw:eip

Scores

CVSS v3 2.7

EPSS 0.0003

EPSS Percentile 7.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-284

Status published

Products (5)

discourse/discourse 2026.3.0 (2 CPE variants)

discourse/discourse 2026.1.0 - 2026.1.3

discourse/discourse >= 2026.1.0-latest, < 2026.1.3

discourse/discourse >= 2026.2.0-latest, < 2026.2.2

discourse/discourse >= 2026.3.0-latest, < 2026.3.0

Published Mar 31, 2026

Tracked Since Mar 31, 2026