CVE-2026-122318
HIGH
NVD
CVSS Score
7.7
Severity
HIGH
Published
Nov 05, 2026
Vendor
unknown
Description
Kyverno before 1.19.2 contains an authentication bypass in matchCertificateData that skips verifyImages subject and subjectRegExp checks when the signing certificate has no Subject Alternative Name. Attackers holding a leaf certificate from a configured private trust root can omit the SAN, set the expected Fulcio issuer OID, and sign malicious images that are admitted despite signer pinning.