GHSA-ggw7-9675-6v4v
MantisBT has an authorization bypass in private issue monitoring
Quick fix
GHSA-ggw7-9675-6v4v — mantisbt/mantisbt: upgrade to the fixed version with the command below.
composer require mantisbt/mantisbt:^2.28.2Details
Using a crafted POST request to bug_monitor_add.php, a user with project-level access can add themselves as a monitor for a private issue they do not have access to. Despite displaying an Access Denied error, the application accepts the request and creates a monitor relationship for the private issue.
### Impact Direct access to the private issue remains blocked, but the user will receive email notifications for updates, leading to disclosure of the private issue's metadata and content.
### Patches - 0a93267deba445fb9d15250c16e6fdb1246ffa65
### Workarounds None
### Credits Thanks to Vishal Shukla for discovering and responsibly reporting the issue.
Are you affected?
Enter the version of the package you're using.
Affected packages
2.26.1Fixed in: 2.28.2composer require mantisbt/mantisbt:^2.28.2References
- https://github.com/mantisbt/mantisbt/security/advisories/GHSA-ggw7-9675-6v4v[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-34579[ADVISORY]
- https://github.com/mantisbt/mantisbt/commit/0a93267deba445fb9d15250c16e6fdb1246ffa65[WEB]
- https://github.com/mantisbt/mantisbt[PACKAGE]
- https://mantisbt.org/bugs/view.php?id=36975[WEB]