CVE-2026-100706
CRITICAL
CVSS 9.9
Published: 2026-09-26
Modified: 2026-09-26
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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.
Quick Facts
| CVE ID | CVE-2026-100706 |
| CVSS Score | 9.9 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| Published | 2026-09-26 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |