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CVE-2026-41485— Kyverno Controller Denial of Service via forEach Mutation Panic

Quick assessment

Affected
kyverno kyverno
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kyverno是Kyverno开源的一个为 Kubernetes 设计的策略引擎。 Kyverno 1.17.2之前版本和1.16.4之前版本存在安全漏洞，该漏洞源于forEach变异处理程序中的未检查类型断言，允许任何具有创建Policy或ClusterPolicy权限的用户使集群范围的后台控制器崩溃进入持久CrashLoopBackOff状态。

CVSS 7.7 · High EPSS 0.57% · P45
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I. Basic Information for CVE-2026-41485

Vulnerability Information
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Vulnerability Title
Kyverno Controller Denial of Service via forEach Mutation Panic
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5
Vulnerability Title
Kyverno 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kyverno是Kyverno开源的一个为 Kubernetes 设计的策略引擎。 Kyverno 1.17.2之前版本和1.16.4之前版本存在安全漏洞，该漏洞源于forEach变异处理程序中的未检查类型断言，允许任何具有创建Policy或ClusterPolicy权限的用户使集群范围的后台控制器崩溃进入持久CrashLoopBackOff状态。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
kyverno kyverno < 1.16.4 -

II. Public POCs for CVE-2026-41485

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III. Intelligence Information for CVE-2026-41485

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Patches & Fixes for CVE-2026-41485 (1)

Vendor Advisories for CVE-2026-41485 (1)

Same Patch Batch · kyverno · 2026-04-24 · 3 CVEs total

CVE-2026-41323 8.1 HIGH Kyverno: ServiceAccount token leaked to external servers via apiCall service URL
CVE-2026-41068 7.7 HIGH Kyverno: Cross-Namespace Read Bypasses RBAC Isolation (CVE-2026-22039 Incomplete Fix)

IV. Related Vulnerabilities

Same product: kyverno
Same vendor: kyverno
Same weakness: CWE-617

V. Comments for CVE-2026-41485

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