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EUVD-2026-319742

fkie_cve-2026-34744

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.

GHSA-rmp5-5jj7-gmvf — MantisBT has an authorization bypass that allows reading attachments after losing access to a private issue

Affected: Packagist: mantisbt/mantisbt

MantisBT permits a user to list and download their own attachments from an Issue created by another user, even after that Issue becomes private and direct access to it is denied.

### Impact The loss of confidentiality caused by this vulnerability is minimal, considering that only the attachments that were previously uploaded by the user themselves remains accessible.

### Patches - de7bdeec36de066235e38a77bf056917d951c84d

### Workarounds None.

### Credits

Thanks to Vishal Shukla for discovering and responsibly reporting the issue.