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CVE-2026-122313— Kyverno 1.17.0 before 1.19.2 Cross-Namespace Privilege Escalation via NamespacedMutatingPolicy

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 1.17.0 至 1.19.2 之前的版本存在权限提升漏洞。该漏洞源于 的 字段在输出 CEL（Common Expression Language）时缺少命名空间检查，导致命名空间作用域的租户能够修改其他命名空间中的资源。攻击者可构造字面目标（例如指向其他租户的 ），进而利用集群范围的后台控制器对其进行篡改，从而添加攻击者所属主体，或修改 、 和 等资源。

CVSS 9.9 · Critical

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-122313

Vulnerability Information
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Vulnerability Title
Kyverno 1.17.0 before 1.19.2 Cross-Namespace Privilege Escalation via NamespacedMutatingPolicy
Source: CVE Program / CVE List V5
Vulnerability Description
Kyverno from 1.17.0 before 1.19.2 contains a privilege escalation vulnerability that allows namespace-scoped tenants to modify resources in other namespaces through NamespacedMutatingPolicy targetMatchConstraints.expression CEL output lacking namespace checks. Attackers can emit a literal target such as another tenant's RoleBinding, which the cluster-wide background controller then mutates to add attacker subjects or alter Roles, NetworkPolicies, and ConfigMaps.
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
特权管理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kyverno kyverno 1.17.0 ~ 1.19.2 -

II. Public POCs for CVE-2026-122313

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-122313

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Other References for CVE-2026-122313 (2)

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

CVE-2026-122303 9.9 CRITICAL Kyverno 1.17.0 before 1.19.2 Cross-Namespace Resource Overwrite via NamespacedMutatingPoli
CVE-2026-122310 9.9 CRITICAL Kyverno 1.19.1 before 1.19.2 Privilege Escalation via Policy apiCall urlPath
CVE-2026-122311 9.9 CRITICAL Kyverno 1.16.0 before 1.19.2 Path Traversal in Namespaced CEL Policies via resource argume
CVE-2026-122304 9.9 CRITICAL Kyverno 1.17.0 before 1.19.2 Privilege Escalation via CleanupPolicy Context Loader
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-2026-122316 8.5 HIGH Kyverno 1.17.0 before 1.19.2 Cross-Namespace Write via NamespacedMutatingPolicy mutateExis
CVE-2026-122308 8.5 HIGH Kyverno before 1.19.2 Label Spoofing via Generation Handler processRequest
CVE-2026-122305 7.7 HIGH Kyverno before 1.19.2 Denial of Service via Nested Variable Substitution Loop
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-2026-122312 7.7 HIGH Kyverno 1.19.1 before 1.19.2 Namespace Isolation Bypass via APICall URLPath Query String
CVE-2026-122306 7.7 HIGH Kyverno before 1.19.2 Denial of Service via Exponential-Time Wildcard Matching
CVE-2026-122322 7.5 HIGH Kyverno from 1.11.0 before 1.19.2 Memory Exhaustion via Notary Attestation Decompression
CVE-2026-122314 7.5 HIGH Kyverno before 1.19.2 Denial of Service via Shallow Variable Substitution Panic
CVE-2026-122323 7.5 HIGH Kyverno 1.11.0 before 1.19.2 Memory Exhaustion via Notary Signature Decompression
CVE-2026-122319 7.5 HIGH Kyverno before 1.19.2 Denial of Service via In/NotIn Operator 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-269