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CVE PROGRAM SOURCE RECORD9.4 Critical

CVE-2026-100706

kyverno before 1.19.1 Privilege Escalation via Policy apiCall urlPath

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

kyverno kyverno

Default version status: unaffected

  • 0 to < 1.19.1affected
  • 1.19.1unaffected
pkg:golang/github.com/kyverno/kyverno

References