Policy Bypass Vulnerability in Kyverno by Nirmata
CVE-2026-122307

8.3HIGH

Key Information:

Vendor

Kyverno

Status
Kyverno
Vendor
CVE Published:
5 November 2026

What is CVE-2026-122307?

A policy bypass vulnerability exists in Kyverno prior to version 1.19.2 that allows users to exploit the admissionpolicygenerator controller. This vulnerability arises because PolicyExceptions can be improperly integrated into the generated ValidatingAdmissionPolicies, disregarding critical parameters such as the --enablePolicyException and --exceptionNamespace flags. Consequently, users possessing namespaced create permissions on PolicyExceptions can introduce negated matchConditions, leading to the admission of non-compliant resources and circumventing established cluster-wide enforcement policies. It is essential to update Kyverno to version 1.19.2 or later to mitigate this risk.

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:
8.3
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

1diot9
.