Medium severity · published May 19, 2026
CVE-2026-34754
MantisBT allows unauthorized users to upload attachments to restricted issues via REST API
4.3
CVSS
0.2%
EPSS
No
On KEV
Description
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior allow an authenticated user to upload attachments to private Issues they are not authorized to access. This issue has been fixed in version 2.28.2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% 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-2026-34754
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34754
github.com
https://github.com/mantisbt/mantisbt/commit/b262b4d2835b81394d75356dead66e52a6275206
github.com
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-h4x5-gvx6-3rwc
mantisbt.org
https://mantisbt.org/bugs/view.php?id=36976
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