Unchecked Type Assertion in Kyverno Policy Engine Allows Attackers to Crash Service
CVE-2026-122315

8.7HIGH

Key Information:

Vendor

Kyverno

Status
Kyverno
Vendor
CVE Published:
5 November 2026

What is CVE-2026-122315?

Kyverno versions prior to 1.19.2 are susceptible to a vulnerability stemming from an unchecked type assertion in the buildStatementMap function. This flaw can be exploited by unauthenticated attackers who craft specific attestation statements, enabling them to crash the policy engine. By pushing an OCI referrer manifest containing a non-string type field, attackers can bypass image verification when the failure policy is set to Ignore, potentially leading to instability in the reports-controller.

Affected Version(s)

kyverno 0 < 1.19.2

kyverno 1.19.2

References

https://github.com/kyverno/kyverno/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/kyverno-before-1.19....
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

r0binak
.