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CVE-2026-122310— Kyverno 1.19.1 before 1.19.2 Privilege Escalation via Policy apiCall urlPath

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.

在版本 1.19.1 到 1.19.2 之前的 Kyverno 中，系统会在清理 Policy 的 后对其进行验证，但实际执行时却使用了原始路径。由于 Kubernetes 客户端会丢弃该路径中的片段（fragment）或查询参数（query），具备命名空间作用域权限的用户若能够创建 Policy，便可利用 或 隐藏 路径段，从而通过 Kyverno 的 ServiceAccount 访问集群作用域的端点，进而获取集群管理员权限。

CVSS 9.9 · Critical
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I. Basic Information for CVE-2026-122310

Vulnerability Information
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Vulnerability Title
Kyverno 1.19.1 before 1.19.2 Privilege Escalation via Policy apiCall urlPath
Source: CVE Program / CVE List V5
Vulnerability Description
Kyverno from 1.19.1 before 1.19.2 validates a Policy's context.apiCall urlPath after cleaning it but executes the raw path, whose fragment or query the Kubernetes client discards. A namespace-scoped user who can create a Policy can hide ../ segments behind # or ? to reach cluster-scoped endpoints with Kyverno's ServiceAccount, gaining cluster admin.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
解释冲突
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kyverno kyverno 1.19.1 ~ 1.19.2 -

II. Public POCs for CVE-2026-122310

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III. Intelligence Information for CVE-2026-122310

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Other References for CVE-2026-122310 (2)

Same Patch Batch · kyverno · 2026-11-05 · 21 CVEs total

CVE-2026-122313 9.9 CRITICAL Kyverno 1.17.0 before 1.19.2 Cross-Namespace Privilege Escalation via NamespacedMutatingPo
CVE-2026-122304 9.9 CRITICAL Kyverno 1.17.0 before 1.19.2 Privilege Escalation via CleanupPolicy Context Loader
CVE-2026-122303 9.9 CRITICAL Kyverno 1.17.0 before 1.19.2 Cross-Namespace Resource Overwrite via NamespacedMutatingPoli
CVE-2026-122311 9.9 CRITICAL Kyverno 1.16.0 before 1.19.2 Path Traversal in Namespaced CEL Policies via resource argume
CVE-2026-122302 9.8 CRITICAL Kyverno before 1.19.2 Privilege Escalation via Generate Rule Permission Check
CVE-2026-122321 9.1 CRITICAL Kyverno 1.18.0 before 1.19.2 verifyImages Cache Signature Verification Bypass
CVE-2026-122308 8.5 HIGH Kyverno before 1.19.2 Label Spoofing via Generation Handler processRequest
CVE-2026-122316 8.5 HIGH Kyverno 1.17.0 before 1.19.2 Cross-Namespace Write via NamespacedMutatingPolicy mutateExis
CVE-2026-122320 7.7 HIGH Kyverno before 1.19.2 Cross-Namespace Resource Read via generate.clone
CVE-2026-122307 7.7 HIGH Kyverno before 1.19.2 Policy Bypass via admissionpolicygenerator PolicyException Handling
CVE-2026-122318 7.7 HIGH Kyverno before 1.19.2 Cosign Identity Check Bypass via Empty SAN Certificates
CVE-2026-122306 7.7 HIGH Kyverno before 1.19.2 Denial of Service via Exponential-Time Wildcard Matching
CVE-2026-122312 7.7 HIGH Kyverno 1.19.1 before 1.19.2 Namespace Isolation Bypass via APICall URLPath Query String
CVE-2026-122305 7.7 HIGH Kyverno before 1.19.2 Denial of Service via Nested Variable Substitution Loop
CVE-2026-122319 7.5 HIGH Kyverno before 1.19.2 Denial of Service via In/NotIn Operator Panic
CVE-2026-122322 7.5 HIGH Kyverno from 1.11.0 before 1.19.2 Memory Exhaustion via Notary Attestation Decompression
CVE-2026-122323 7.5 HIGH Kyverno 1.11.0 before 1.19.2 Memory Exhaustion via Notary Signature Decompression
CVE-2026-122314 7.5 HIGH Kyverno before 1.19.2 Denial of Service via Shallow Variable Substitution Panic
CVE-2026-122315 7.5 HIGH Kyverno before 1.19.2 Image Verification Bypass via Attestation Type Panic
CVE-2026-122309 6.2 MEDIUM Kyverno before 1.19.2 Denial of Service via Unbounded CEL Policy Evaluation Cost

IV. Related Vulnerabilities

Same product: kyverno
Same vendor: kyverno
Same weakness: CWE-436