GitHub Advisoryadvisory · Packagist
GHSA-h4x5-gvx6-3rwc MantisBT has an Authorization Bypass that Allows Uploading Attachments to Private Issues via REST API
MEDIUM
Official page ↗
- Aliases
- CVE-2026-34754
- Ecosystem
- Packagist
- Packages
- mantisbt/mantisbt
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weaknesses
- CWE-284
- Reviewed
- 2026-05-11
Affected packages
• Packagist mantisbt/mantisbt: < 2.28.2 → fixed in 2.28.2
Description
Impact
MantisBT allows an authenticated user to upload attachments to private Issues they are not authorized to access.
Patches
• b262b4d2835b81394d75356dead66e52a6275206
Workarounds
None.
Credits
Thanks to Vishal Shukla for discovering and responsibly reporting the issue.
Related
Alias · CVE (1)
- CVE-2026-34754 Mantis Bug Tracker (MantisBT) is an open source issue tracker. vulnerability
Weakness · CWE (1)
- CWE-284 Improper Access Control weakness
References
- https://github.com/mantisbt/mantisbt/security/advisories/GHSA-h4x5-gvx6-3rwc web
- https://nvd.nist.gov/vuln/detail/CVE-2026-34754 advisory
- https://github.com/mantisbt/mantisbt/commit/b262b4d2835b81394d75356dead66e52a6275206 web
- https://github.com/mantisbt/mantisbt package
- https://mantisbt.org/bugs/view.php?id=36976 web