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

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...

CVE-2026-42071

Summary: CVE-2026-42071 affects MantisBT, specifically versions 2.23.0 through 2.28.1, where a missing authorization check in the file visibility function allows any authenticated user (REPORTER+) to download attachments from private bugnotes via REST API GET /api/rest/issues/{id}/files and SOAP ...