Vulnerability · Published Nov 5, 2026 · Assigned by VulnCheck

CVE-2026-122309Kyverno before 1.19.2 Denial of Service via Unbounded CEL Policy Evaluation Cost

Medium 6.2

In plain English

A medium-severity uncontrolled resource consumption 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 9% of all known vulnerabilities).

Severity (CVSS 3.1)6.2Medium

Exploit odds (30 days)0.2%top 90.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

Kyverno before 1.19.2 contains a denial of service vulnerability that allows namespace-scoped policy authors to exhaust CPU and memory by submitting CEL expressions evaluated without runtime cost limits. Attackers can create a NamespacedValidatingPolicy or NamespacedDeletingPolicy with nested map comprehensions over large ConfigMap fields to OOM-kill Kyverno pods and block cluster-wide admission.

Affected products (as reported)

Vendor	Product	Versions
kyverno	kyverno	0 – before 1.19.2

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-m8p2-qqmx-j53x) vendor-advisory
VulnCheck Advisory: Kyverno before 1.19.2 Denial of Service via Unbounded CEL Policy Evaluation Cost third-party-advisory