CVE-2026-23881— Kyverno Denial of Service via Context Variable Amplification in Policy Engine
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I. Basic Information for CVE-2026-23881
Vulnerability Information
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Vulnerability Title
Kyverno Denial of Service via Context Variable Amplification in Policy Engine
Source: NVD (National Vulnerability Database)
Vulnerability Description
Kyverno is a policy engine designed for cloud native platform engineering teams. Versions prior to 1.16.3 and 1.15.3 have unbounded memory consumption in Kyverno's policy engine that allows users with policy creation privileges to cause denial of service by crafting policies that exponentially amplify string data through context variables. Versions 1.16.3 and 1.15.3 contain a patch for the vulnerability.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
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 1.16.3之前版本和1.15.3之前版本存在安全漏洞，该漏洞源于策略引擎存在无限制内存消耗，可能导致具有策略创建权限的用户通过特制策略造成拒绝服务。
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
II. Public POCs for CVE-2026-23881
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IV. Related Vulnerabilities
Same product: kyverno
- CVE-2026-41485
Kyverno Controller Denial of Service via forEach Mutation Pa - CVE-2026-41323
Kyverno: ServiceAccount token leaked to external servers via - CVE-2026-41068
Kyverno: Cross-Namespace Read Bypasses RBAC Isolation (CVE-2 - CVE-2026-40868
kyverno apicall servicecall implicit bearer token injection - CVE-2026-4789
CVE-2026-4789
Same vendor: kyverno
- CVE-2026-41485
Kyverno Controller Denial of Service via forEach Mutation Pa - CVE-2026-41323
Kyverno: ServiceAccount token leaked to external servers via - CVE-2026-41068
Kyverno: Cross-Namespace Read Bypasses RBAC Isolation (CVE-2 - CVE-2026-40868
kyverno apicall servicecall implicit bearer token injection - CVE-2026-4789
CVE-2026-4789
Same weakness: CWE-770
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