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CVE-2026-100704

7.7 · HIGH

Kyverno is a policy engine for Kubernetes.

Published Sep 26, 2026CWE-863EPSS 0.22%

Overview

CVE-2026-100704 is a high-severity vulnerability. It was published on September 26, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4cRefwww.vulncheck.com/advisories/kyverno-before-1.19.1-imagevalidatingpolicy-exception-bypassGitHubgithub.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-100704?

CVE-2026-100704 is a high-severity vulnerability. It was published on September 26, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

How severe is CVE-2026-100704?

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-100704?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-100704?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-100704 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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