high · CVSS v3 7.7 · CVSS v4 7.2

CVE-2026-122318

Kyverno before 1.19.2 contains an authentication bypass in matchCertificateData that skips verifyImages subject and subj…

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.

Scores

Severity
high
CVSS v2
6.1
CVSS v3
7.7
CVSS v4
7.2
EPSS
—

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