Denial of Service Vulnerability in Kyverno Policy Engine
CVE-2026-122314

8.7HIGH

Key Information:

Vendor

Kyverno

Status
Kyverno
Vendor
CVE Published:
5 November 2026

What is CVE-2026-122314?

Kyverno versions prior to 1.19.2 are susceptible to a Denial of Service attack due to an unchecked type assertion within the variable-substitution engine. This flaw allows attackers to submit malformed resources containing non-string fields referenced by {{- variable }} shallow substitutions in policies. The consequence of this submission is a crash of the policy engine, resulting in webhook denial of service and potential policy bypass when the failurePolicy is set to Ignore.

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
.