CVE-2026-100707: Kyverno

High severity, CVSS 7.7. EPSS: 0.5% chance of exploitation in the next 30 days.

Kyverno before 1.19.1 contains a namespace isolation bypass in the apiCall context entry of namespaced Policy resources due to inconsistent path interpretation between validation and execution. A low-privilege tenant can use percent-encoded dot-segments in urlPath to bypass namespace checks and read resources from other namespaces using the Kyverno admission controller's ServiceAccount credentials.

Affected products

• Kyverno Kyverno: before 1.19.1 (fixed in 1.19.1)

Published 2026-09-26. Last modified 2026-09-28.