Bug 2567773 (CVE-2026-122318) - CVE-2026-122318 github.com/kyverno/kyverno: Kyverno: Image verification bypass via missing Subject Alternative Name in signing certificates
Summary: CVE-2026-122318 github.com/kyverno/kyverno: Kyverno: Image verification bypas...
Keywords:
Status: NEW
Alias: CVE-2026-122318
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-05 22:24 UTC by OSIDB Bzimport
Modified: 2026-11-06 01:14 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-11-05 22:24:55 UTC 
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.
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