CVE-2026-34970 MantisBT Bugnote Revision Page Leaks Private Issue Metadata After Issue Access Is Revoked
Attackers can view private issue metadata via bugnote revision pages even after losing access to the parent issue.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-34970?
CVE-2026-34970 is a medium-severity vulnerability in mantisbt, published on 19 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2026-34970?
2 open source packages ship an affected version, including mantisbt/mantisbt.
| Package | Affected | Fixed in |
|---|---|---|
mantisbt/mantisbt Packagist | All versions | 2.28.2 |
mantisbt/mantisbt Packagist | All versions | 2.28.2 |
How do I fix CVE-2026-34970?
Upgrade mantisbt/mantisbt to 2.28.2 or later.
Is CVE-2026-34970 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34970 exists.
Sources
Also known as GHSA-crmx-4p49-46m2.