CRITICALVulnerability
Verified
Global

NVD CRITICAL: CVE-2026-100706 — kyverno before 1.19.1 fails to properly validate URL-encoded path segments in Po...

·Source: NIST NVD

Updated:

Executive Summary

kyverno before 1.19.1 fails to properly validate URL-encoded path segments in Policy apiCall urlPath, allowing namespace tenants to bypass the per-namespace clamp and create objects in other namespaces as the admission-controller ServiceAccount. Attackers can exploit this by using percent-encoded directory traversal sequences to create MutatingWebhookConfiguration objects cluster-wide or PolicyExc

Analysis

kyverno before 1.19.1 fails to properly validate URL-encoded path segments in Policy apiCall urlPath, allowing namespace tenants to bypass the per-namespace clamp and create objects in other namespaces as the admission-controller ServiceAccount. Attackers can exploit this by using percent-encoded directory traversal sequences to create MutatingWebhookConfiguration objects cluster-wide or PolicyException objects in the kyverno namespace, enabling privilege escalation to cluster admin. CVSS Score: 9.9. Published: 2026-09-26T14:16:55.843.

Indicators of Compromise (1)

CVE (1)
CVE-2026-100706
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Sep 26, 2026. Verified by: NIST.

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