CVE-2026-18749CWE-639

CVE-2026-18749

Critical · published August 13, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
42.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00512 · 42.8th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-08-13T02:17Z
References (2)
https://github.com/CERTCC/VINCE · [email protected]https://github.com/CERTCC/VINCE/pull/235 · [email protected]
EPSS history
Timeline
  • 12 AUG 21:10Z
    CVE-2026-18749
    cvelistv5