CVE-2026-100704

Kyverno is a policy engine for Kubernetes. In versions 1.14.0 through 1.19.0, the ImageValidatingPolicy (policies.kyverno.io/v1beta1) evaluator never reads the spec.images and spec.allowedValues fields of a PolicyException. Any PolicyException whose policyRefs and matchConditions match a resource causes image signature verification to be skipped for the entire resource rather than only for the listed images or values, so an exception intended to exempt a single trusted image exempts every image on the matched resource(s). As a result, unsigned or untrusted images can be admitted to the cluster without signature verification. This differs from ValidatingPolicy, GeneratingPolicy, and MutatingPolicy, which treat the same field as a partial exemption. The issue is fixed in version 1.19.1.

CVSS v3 7.7 HIGH

7.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.1 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4c
https://www.vulncheck.com/advisories/kyverno-before-1.19.1-imagevalidatingpolicy-exception-bypass
https://github.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4c

Configurations

No configuration.

History

28 Sep 2026, 15:17

Type	Values Removed	Values Added
References	~~() https://github.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4c -~~	() https://github.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4c -

26 Sep 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-26 14:16

Updated : 2026-09-30 17:23

NVD link : CVE-2026-100704

Mitre link : CVE-2026-100704

CVE.ORG link : CVE-2026-100704

JSON object : View

Products Affected

No product.

CWE

CWE-863

Incorrect Authorization

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