CVE-2026-34744

MantisBT authorization bypass allows continued access to self-uploaded attachments on private issues

State: Published
Severity: 5.3 Medium
Published: May 19, 2026
Updated: May 20, 2026
Reserved: Mar 30, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-281 Improper Preservation of Permissions

Affected Products

Product	Versions
mantisbtmantisbt	< 2.28.2Affected

References

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