Vulnerability in Kyverno
CVE-2026-122310
Kyverno from 1.19.1 before 1.19.2 validates a Policy's context.apiCall urlPath after cleaning it but executes the raw path, whose fragment or query the Kubernetes client discards. A namespace-scoped user who can create a Policy can hide ../ segments behind # or ? to reach cluster-scoped endpoints with Kyverno's ServiceAccount, gaining cluster admin.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
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-3xfv-vq8x-qhg4 (vendor-advisory)
- www.vulncheck.com/advisories/kyverno-1.19.1-before-1.19.2-privilege-escalation-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-122310?
- CVE-2026-122310 is a critical-severity vulnerability in Kyverno, classified under CWE-436. CVSS score: 9.9/10. Published 2026-11-05.
- How severe is CVE-2026-122310?
- Critical severity. CVSS v3 base score is 9.9 out of 10.