Medium severity · published May 28, 2026
CVE-2026-42070
MantisBT: Authorization Bypass in Bugnote Editing via Issue Update API
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, the mc_issue_update() function in MantisBT allows users having update_bug_threshold access (UPDATER, with default settings) to edit, change view state, and modify time tracking on bugnotes belonging to other users — bypassing the default DEVELOPER (level 55) threshold required by the dedicated mc_issue_note_update() function. This vulnerability is fixed in 2.28.2.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
mantisbt · mantisbt
< 2.28.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42070
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42070
github.com
https://github.com/mantisbt/mantisbt/commit/6e58fae4f22efdc3987f903c8ba2611de17a9435
github.com
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-pq86-j2c2-47f6
mantisbt.org
https://mantisbt.org/bugs/view.php?id=37089
mantisbt.org
https://mantisbt.org/bugs/view.php?id=37093
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