Vulnerability Details CVE-2026-122318
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 7.1%
CVSS Severity
CVSS v3 Score 7.7