CVE-2026-34744 MantisBT authorization bypass allows continued access to self-uploaded attachments on private issues
Users can access their own attachments on private issues created by others, bypassing read access restrictions in MantisBT.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-34744?
CVE-2026-34744 is a medium-severity missing authorization vulnerability in mantisbt, published on 19 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior permit a user to list and download their own attachments from an Issue created by another user even after it becomes private, bypassing read access revocation. The loss of confidentiality caused by this vulnerability is minimal, considering that only attachments previously uploaded by the user themselves remain accessible. This issue has been fixed in version 2.82.2.
Which versions are affected by CVE-2026-34744?
2 open source packages ship an affected version, including mantisbt/mantisbt.
| Package | Affected | Fixed in |
|---|---|---|
mantisbt/mantisbt Packagist | All versions | 2.28.2 |
mantisbt/mantisbt Packagist | All versions | 2.28.2 |
How do I fix CVE-2026-34744?
Upgrade mantisbt/mantisbt to 2.28.2 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-34744 being exploited?
There is no known exploitation of CVE-2026-34744 in the wild and no public exploit code.
Sources
Also known as GHSA-rmp5-5jj7-gmvf.