MantisBT: Bugnote Revision Page Leaks Private Issue Metadata After Issue Access Is Revoked

MEDIUM 5.3CVE-2026-34970 · GHSA-crmx-4p49-46m2 · Published 20/05/2026 · updated 24/07/2026

In short

CVE-2026-34970 is a MEDIUM (CVSS 5.3) vulnerability affecting mantisbt/mantisbt.
Chance of exploitation in the next 30 days (EPSS): 0.37%, higher than 31.2% of all vulnerabilities.
Fix: update to 2.28.2 or later.

Package	Affected versions	Patched versions
mantisbt/mantisbt Packagist	`< 2.28.2`	`2.28.2`

Description

MantisBT allows a bugnote author to access the note's Revisions page after losing access to the parent private issue.

Impact

Disclosure of the private Issue's Id and Summary. The bugnote full revision body remains secure.

Patches

71df1f67e05b2050cd4bd87839e6cc13747cf03f

Workarounds

None

Credits

Thanks to Vishal Shukla for discovering and responsibly reporting the issue.

NVD description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior allow a bugnote author to access the note's Revisions page after losing access to the parent private issue. This issue has been fixed in version 2.28.2.

References

mantisbt/mantisbt security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2026-34970 · ADVISORY
mantisbt/mantisbt commit 71df1f6 · WEB
mantisbt/mantisbt · PACKAGE
mantisbt.org/bugs/view.php · WEB

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Package

Affected versions

Patched versions

mantisbt/mantisbt

Packagist

< 2.28.2

2.28.2