CVE-2026-122310

CriticalCVSS 9.9/10Last modified Nov 10, 2026

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.

Metrics

CVSS 3.1 9.9/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-436

Affected software

VendorProductVersions
kyvernokyverno>= 1.19.1, < 1.19.2

References

Timeline

Published
Nov 5, 2026
Last modified
Nov 10, 2026
NVD status
Analyzed

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CVE-2026-122310: Critical severity, CVSS 9.9 | Vulnix