CVE-2026-18749

CRITICAL CVSS 3.1: 9.8 EPSS 0.35%
Updated Aug 13, 2026
Cert/Cc
Parameter Value
CVSS 9.8 (CRITICAL)
Type CWE-639 (Authorization Bypass), CWE-639: Authorization Bypass Through User-Controlled Key
Vendor Cert/Cc
Public PoC No

The type=track branch authorises on _is_my_case(t_attach.case) only and never checks VinceTrackAttachment.shared. A coordinator-uploaded case artefact that has NOT been marked shared is still retrievable by any case member who has (or is sent) its uuid — leaks not-yet-released coordinator material to vendors on the case.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products

cert/cc:vince