CVE-2026-100707

High

Description

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.

SeverityHigh

CVSS7.7

Exploit probability—

ProductKyverno

PublishedSep 26, 2026

First seenSep 26, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

kyverno kyverno1.19.1 or later

Vendor advisories

github.com/kyverno/kyverno/security/advisories/GHSA-c5qq-7g2q-cpqp

Affected products

Product	Affected versions	Fixed in
kyverno kyverno	v < 1.19.1	1.19.1

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