Vulnerability · Published Nov 5, 2026 · Assigned by VulnCheck

CVE-2026-122311Kyverno 1.16.0 before 1.19.2 Path Traversal in Namespaced CEL Policies via resource argument

Critical 9.9

In plain English

A critical-severity path traversal in kyverno from kyverno. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)0.4%top 60.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

Kyverno from 1.16.0 before 1.19.2 fails to validate path segments in the resource argument of resource.get() and resource.post(), allowing namespaced CEL policies to escape their namespace. Tenants who can create a NamespacedValidatingPolicy can insert .. segments to read and write arbitrary cluster objects using the admission controller's ServiceAccount, leading to cluster takeover.

Affected products (as reported)

Vendor	Product	Versions
kyverno	kyverno	1.16.0 – before 1.19.2

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-4pqm-wqq6-h9q2) vendor-advisory
VulnCheck Advisory: Kyverno 1.16.0 before 1.19.2 Path Traversal in Namespaced CEL Policies via resource argument third-party-advisory