Vulnerability details

CVE-2026-41485

kyverno kyverno

Kyverno Controller Denial of Service via forEach Mutation Panic

CVSS 3.1

7.7High

Official description

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.

CVSS scores

Score	Version	Source	Vector
7.7High	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H`

Affected products

Vendor	Product	Versions	Source
kyverno	kyverno	< 1.16.4	CVEProject cvelistV5 (CNA)
kyverno	kyverno	>= 1.17.0-rc1, < 1.17.2	CVEProject cvelistV5 (CNA)

References and advisories

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

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Details

Published: 2026-04-24
Last updated: 2026-04-24
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.36%

Probability of exploitation in 30 days

30.9%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Partial

Weaknesses (CWE)

CWE-617
Reachable Assertion