CVE-2026-42071 HIGH

CVE-2026-42071: MantisBT: Private Bugnote Attachment Content Leak via REST API

Vendor Mantisbt
Product mantisbt
Weakness CWE-862 · Missing authorization
Published May 28, 2026
Last update May 29, 2026
View on NVD All CVEs

CVSS base score

7.2/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 28, 2026 CVE published
May 29, 2026 Record updated