CVE-2026-40868— kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token
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I. Basic Information for CVE-2026-40868
Vulnerability Information
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Vulnerability Title
kyverno apicall servicecall implicit bearer token injection leaks kyverno serviceaccount token
Source: NVD (National Vulnerability Database)
Vulnerability Description
Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to 1.16.4, kyverno’s apiCall servicecall helper implicitly injects Authorization: Bearer ... using the kyverno controller serviceaccount token when a policy does not explicitly set an Authorization header. Because context.apiCall.service.url is policy-controlled, this can send the kyverno serviceaccount token to an attacker-controlled endpoint (confused deputy). Namespaced policies are blocked from servicecall usage by the namespaced urlPath gate in pkg/engine/apicall/apiCall.go, so this report is scoped to ClusterPolicy and global context usage. This vulnerability is fixed in 1.16.4.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
敏感信息的不安全存储
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 1.16.4之前版本存在安全漏洞，该漏洞源于apiCall servicecall助手隐式注入授权令牌，可能导致将服务账户令牌发送到攻击者控制的端点。
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-2026-40868
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IV. Related Vulnerabilities
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Kyverno Controller Denial of Service via forEach Mutation Pa - CVE-2026-41323
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CVE-2026-4789 - CVE-2026-23881
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CVE-2026-4789 - CVE-2026-23881
Kyverno Denial of Service via Context Variable Amplification
Same weakness: CWE-922
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