Auth bypass in Kyverno
CVE-2026-122320
Kyverno before 1.19.2 contains a missing authorization vulnerability that allows namespaced Policy authors to read resources in other namespaces by templating generate.clone or cloneList namespace values. Attackers can annotate a triggering ConfigMap so the background-controller copies a victim namespace's sensitive ConfigMap into the attacker's namespace, enabling cross-tenant data disclosure.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/kyverno/kyverno/security/advisories/GHSA-493q-9xvg-9xf3 (vendor-advisory)
- www.vulncheck.com/advisories/kyverno-before-1.19.2-cross-namespace-resource-rea… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-122320?
- CVE-2026-122320 is a high-severity vulnerability in Kyverno, classified under Missing Authorization. CVSS score: 7.7/10. Published 2026-11-05.
- How severe is CVE-2026-122320?
- High severity. CVSS v3 base score is 7.7 out of 10.