Vulnerability · Published Sep 26, 2026 · Assigned by VulnCheck

CVE-2026-100703Kyverno before 1.19.1 Cross-Namespace Data Access via globalcontext.Lib

High 7.7

In plain English

A high-severity information exposure 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 0.2% (higher than 14% of all known vulnerabilities).

Severity (CVSS 3.1)7.7High

Exploit odds (30 days)0.2%top 86.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Kyverno 1.16.0 through 1.19.0 registers the globalcontext.Lib CEL library in its policy environment without confining it to the policy's namespace, unlike the sibling libraries (resource.Lib, http.Lib, configMap loader) which are handed the policy namespace. A tenant who can create a namespaced policy (e.g. NamespacedValidatingPolicy, and likewise the namespaced mutating, deleting, generating, and image-validating policy kinds) in their own namespace can call globalContext.get("<entry>", "") and receive the full cached contents of a cluster-scoped GlobalContextEntry, including data cached from namespaces the tenant has no RBAC permission to read. No admission validation rejects such calls. Fixed in 1.19.1.

Affected products (as reported)

Vendor	Product	Versions
kyverno	kyverno	1.16.0 – before 1.19.1

Weakness: CWE-200 · 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-59v6-2x73-wfg4) vendor-advisory
VulnCheck Advisory: Kyverno before 1.19.1 Cross-Namespace Data Access via globalcontext.Lib third-party-advisory