High severity · published May 28, 2026
CVE-2026-42071
MantisBT: Private Bugnote Attachment Content Leak via REST API
7.2
CVSS
0.3%
EPSS
No
On KEV
Description
Mantis Bug Tracker (MantisBT) is an open source issue tracker. From 2.23.0 to 2.28.1, a missing authorization check in MantisBT's file visibility function allows any authenticated user (REPORTER+) to download attachments on private bugnotes they should not be able to access, via the REST API endpoint GET /api/rest/issues/{id}/files and SOAP API mc_issue_attachment_get endpoint. 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
>= 2.23.0, < 2.28.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42071
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42071
github.com
https://github.com/mantisbt/mantisbt/commit/029d9d203d9e4ae96b3e59d552fa7395cc1e5071
github.com
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-pw5x-2mf9-3xc8
mantisbt.org
https://mantisbt.org/bugs/view.php?id=27039
mantisbt.org
https://mantisbt.org/bugs/view.php?id=36985
mantisbt.org
https://mantisbt.org/bugs/view.php?id=37092
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