CVE-2026-34754

MantisBT allows unauthorized users to upload attachments to restricted issues via REST API

State: Published
Severity: 4.3 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 allow an authenticated user to upload attachments to private Issues they are not authorized to access. This issue has been fixed in version 2.28.2.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N	GitHub_M

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
mantisbtmantisbt	< 2.28.2Affected

References

https://github.com/mantisbt/mantisbt/security/advisories/GHSA-h4x5-gvx6-3rwc
https://github.com/mantisbt/mantisbt/commit/b262b4d2835b81394d75356dead66e52a6275206
https://mantisbt.org/bugs/view.php?id=36976

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