Vulnerability · Published Nov 5, 2026 · Assigned by VulnCheck

CVE-2026-122312Kyverno 1.19.1 before 1.19.2 Namespace Isolation Bypass via APICall URLPath Query String

High 7.7

In plain English

A high-severity privilege mismanagement 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 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.1)7.7High

Exploit odds (30 days)0.3%top 75.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

Kyverno from 1.19.1 before 1.19.2 contains a namespace isolation bypass in APICall Fetch() in pkg/engine/apicall/apiCall.go because path.Clean treats '?' as a path character, letting the namespace regex match segments inside the query string. Users who can create namespaced policies can supply a URLPath like /api/v1/nodes?x=/namespaces/default/ that passes validation while client-go requests the cluster-scoped endpoint, reading resources outside their namespace.

Affected products (as reported)

Vendor	Product	Versions
kyverno	kyverno	1.19.1 – before 1.19.2

Weakness: CWE-269 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-pcx2-xcq4-65vf) vendor-advisory
Patch Commit patch
VulnCheck Advisory: Kyverno 1.19.1 before 1.19.2 Namespace Isolation Bypass via APICall URLPath Query String third-party-advisory