MantisBT 2.28.1- Auth users can upload attachments to private before 2.28.2
CVE-2026-34754 Published on May 19, 2026
MantisBT allows unauthorized users to upload attachments to restricted issues via REST API
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.
Vulnerability Analysis
CVE-2026-34754 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
What is an Authorization Vulnerability?
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CVE-2026-34754 has been classified to as an Authorization vulnerability or weakness.
Products Associated with CVE-2026-34754
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Affected Versions
mantisbt Version < 2.28.2 is affected by CVE-2026-34754Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.