CVE-2026-41485

HIGH 7.7

Kyverno Controller Denial of Service via forEach Mutation Panic

CVSS Score

7.7

EPSS Score

0.0%

EPSS Percentile

0th

Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.17.2 and 1.16.4, an unchecked type assertion in the `forEach` mutation handler allows any user with permission to create a `Policy` or `ClusterPolicy` to crash the cluster-wide background controller into a persistent CrashLoopBackOff. The same bug also causes the admission controller to drop connections and block all matching resource operations. The crash loop persists until the policy is deleted. The vulnerability is confined to the legacy engine, and CEL-based policies are unaffected. Versions 1.17.2 and 1.16.4 fix the issue.

CWE	CWE-617
Vendor	kyverno
Product	kyverno
Published	Apr 24, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

kyverno / kyverno

< 1.16.4 >= 1.17.0-rc1, < 1.17.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/kyverno/kyverno/security/advisories/GHSA-fpjq-c37h-cqcv github.com: https://github.com/kyverno/kyverno/commit/76c8fdbe87328722e099e1fd44c3f21c9f7809cb github.com: https://github.com/kyverno/kyverno/commit/80e728c2283a0c65e5adb02d8a907106e6ebe7e3