Auth bypass in Multivendorx

CVE-2026-66651

Unauthenticated Broken Access Control in MultiVendorX <= 5.0.14 versions.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Multivendorx

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-66651?: CVE-2026-66651 is a medium-severity vulnerability in Multivendorx, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-08-18.
How severe is CVE-2026-66651?: Medium severity. CVSS v3 base score is 6.5 out of 10.