# CVE-2026-122307: Kyverno admissionpolicygenerator policy bypass in PolicyException handling

Source: https://junglewise.ai/threats/cve-2026-122307-kyverno-before-1-19-2-contains-a-policy-bypass-vulnerability-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-05. Updated: 2026-11-05  
License: CC BY 4.0 with a link back

CVE-2026-122307 · Severity: high · CVSS 7.7 · Published 2026-11-05

Kyverno is a Kubernetes policy engine that enforces security and governance rules across container clusters. A flaw in its admissionpolicygenerator controller allows users with the ability to create PolicyExceptions to bypass cluster-wide security policies by injecting exceptions into generated admission policies, even when the cluster administrator has disabled or restricted PolicyExceptions. An attacker can exploit this to admit resources that violate cluster security policies.

Technologies: [Kyverno](https://junglewise.ai/threats/technologies/kyverno). Vendors: [Kyverno](https://junglewise.ai/threats/vendors/kyverno).

## Quick answers

**Is CVE-2026-122307 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-122307 being exploited in the wild.

**How severe is CVE-2026-122307?** High severity, with a CVSS score of 7.7, published 5 November 2026.

**Which products and versions are affected?** Kyverno before 1.19.2.

**Is there a fix for CVE-2026-122307?** Yes: fixed in 1.19.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-122307 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-122307?** Check whether you run Kyverno at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 1.19.2

## Technical details

The admissionpolicygenerator controller folds PolicyExceptions into generated ValidatingAdmissionPolicies without applying enforcement-side gates (--enablePolicyException flag, --exceptionNamespace confinement, and policy kind checks). Any user who can create a namespaced CEL PolicyException can inject negated matchConditions to exclude arbitrary resources from enforcement. The vulnerability stems from getCELExceptions() matching only on policy name without validating enabled status, namespace, or policy kind, allowing cluster-wide bypass of ValidatingPolicies where the generated policy becomes the sole enforcement layer.

## Affected products

- Kyverno Kyverno before 1.19.2

## Timeline

- 2026-10-21: disclosed
- 2026-11-05: advisory

## References

- [https://github.com/kyverno/kyverno/security/advisories/GHSA-qc9c-3fgf-cgq8](https://github.com/kyverno/kyverno/security/advisories/GHSA-qc9c-3fgf-cgq8)
- [https://www.vulncheck.com/advisories/kyverno-before-1.19.2-policy-bypass-via-admissionpolicygenerator-policyexception-handling](https://www.vulncheck.com/advisories/kyverno-before-1.19.2-policy-bypass-via-admissionpolicygenerator-policyexception-handling)

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