---
title: "CVE-2026-100704: Kyverno - Authentication Bypass"
description: "Kyverno 1.14.0 through 1.19.0 contains an image signature verification bypass caused by ImageValidatingPolicy evaluator ignoring spec.images and spec.allowedValues in PolicyException, letting attackers admit unsigned or untrusted images, exploit requires matching PolicyException with policyRefs and matchConditions."
url: https://panop.io/threat-heartbeat/CVE-2026-100704/
---

# CVE-2026-100704 Kyverno - Authentication Bypass

Kyverno 1.14.0 through 1.19.0 contains an image signature verification bypass caused by ImageValidatingPolicy evaluator ignoring spec.images and spec.allowedValues in PolicyException, letting attackers admit unsigned or untrusted images, exploit requires matching PolicyException with policyRefs and matchConditions.

CVSS base score 7.7 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.18% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100704)

## Details

Type

Authentication Bypass

Impact

Bypass

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Published

26 September 2026

Updated

15 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Update to version 1.19.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100704](https://nvd.nist.gov/vuln/detail/CVE-2026-100704)
- [https://github.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4c](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://www.vulncheck.com/advisories/kyverno-before-1.19.1-imagevalidatingpolicy-exception-bypass)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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