CVE-2026-41323— Kyverno: ServiceAccount token leaked to external servers via apiCall service URL
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I. Basic Information for CVE-2026-41323
Vulnerability Information
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Vulnerability Title
Kyverno: ServiceAccount token leaked to external servers via apiCall service URL
Source: NVD (National Vulnerability Database)
Vulnerability Description
Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4, Kyverno's apiCall feature in ClusterPolicy automatically attaches the admission controller's ServiceAccount token to outgoing HTTP requests. The service URL has no validation — it can point anywhere, including attacker-controlled servers. Since the admission controller SA has permissions to patch webhook configurations, a stolen token leads to full cluster compromise. Versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4 patch the issue.
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
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Kyverno 信息泄露漏洞
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存在信息泄露漏洞，该漏洞源于apiCall功能自动附加ServiceAccount令牌，可能导致集群完全受损。以下版本受到影响：1.18.0-rc1之前版本、1.17.2-rc1之前版本和1.16.4之前版本。
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-2026-41323
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Same Patch Batch · kyverno · 2026-04-24 · 3 CVEs total
| CVE-2026-41068 | 7.7 HIGH | Kyverno: Cross-Namespace Read Bypasses RBAC Isolation (CVE-2026-22039 Incomplete Fix) |
| CVE-2026-41485 | 7.7 HIGH | Kyverno Controller Denial of Service via forEach Mutation Panic |
IV. Related Vulnerabilities
Same product: kyverno
- CVE-2026-41485
Kyverno Controller Denial of Service via forEach Mutation Pa - 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 - CVE-2026-23881
Kyverno Denial of Service via Context Variable Amplification
Same vendor: kyverno
- CVE-2026-41485
Kyverno Controller Denial of Service via forEach Mutation Pa - 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 - CVE-2026-23881
Kyverno Denial of Service via Context Variable Amplification
Same weakness: CWE-200
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V. Comments for CVE-2026-41323
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