CVE-2026-42071 json
MantisBT: Private Bugnote Attachment Content Leak via REST API
published 5mo ago modified last mo. also EUVD-2026-33027 , GHSA-pw5x-2mf9-3xc8
- cvss
- 7.2
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 17%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist mantisbt/mantisbt 2.28.2
- mantisbt mantisbt 2.28.2
Is CVE-2026-42071 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.2 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N |
| CNA | 4.0 | 7.2 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | mantisbt/mantisbt | >=2.23.0, <2.28.2 |
2.28.2 |
Affected products
- mantisbt mantisbt
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/mantisbt/mantisbt/commit/029d9d203d9e4ae96b3e59d552fa7395cc1e5071
web
-
github.com
/mantisbt/mantisbt/security/advisories/GHSA-pw5x-2mf9-3xc8
web
-
mantisbt.org
/bugs/view.php?id=27039
web
-
mantisbt.org
/bugs/view.php?id=36985
web
-
mantisbt.org
/bugs/view.php?id=37092
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-42071
advisory
-
github.com
/advisories/GHSA-xjmx-cprh-646r
advisory
-
github.com
/mantisbt/mantisbt
package
Sources
- CVE List CVE-2026-42071
- GitHub Advisory GHSA-pw5x-2mf9-3xc8
- NVD CVE-2026-42071
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.