CVE-2026-33415 Discourse: Improper Access Control in discourse-ai Allows Unauthorized Category Content Exposure
Authenticated moderators can bypass category permissions to view unauthorized post content, topic titles, and usernames via a sentiment analytics endpoint.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33415?
CVE-2026-33415 is a medium-severity missing authorization vulnerability in Discourse Discourse, published on 31 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-284
Which versions are affected by CVE-2026-33415?
1 open source package ship an affected version, including discourse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | From 2026.1.0 | 2026.1.3, 2026.2.2 |
Products include Discourse Discourse.
How do I fix CVE-2026-33415?
Upgrade discourse to a fixed version for your release line: 2026.1.3 or 2026.2.2.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-33415 being exploited?
There is no known exploitation of CVE-2026-33415 in the wild and no public exploit code.
Other vulnerabilities in Discourse Discourse
- CVE-2021-41163 RCE via malicious SNS subscription payload
- CVE-2022-36066 Discourse vulnerable to RCE via admins uploading maliciously zipped file
- CVE-2022-39356 Discourse user account takeover via email and invite link
- CVE-2023-22468 Discourse vulnerable to Cross-site Scripting in local oneboxes
- CVE-2026-27934 Discourse leaks private topic title and post excerpt via user action API endpoint
Sources
Also known as BIT-discourse-2026-33415, GHSA-vj5f-gg8m-93xg.