What is CVE-2026-18749?

CVE-2026-18749 is a critical-severity vulnerability in Cert/cc Vince, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.8/10. Published 2026-08-12.

How severe is CVE-2026-18749?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Cert/cc Vince

CVE-2026-18749

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 s…

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Cert/cc Vince — versions 0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

cret@cert.org
cret@cert.org

Frequently asked questions

What is CVE-2026-18749?: CVE-2026-18749 is a critical-severity vulnerability in Cert/cc Vince, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.8/10. Published 2026-08-12.
How severe is CVE-2026-18749?: Critical severity. CVSS v3 base score is 9.8 out of 10.