Auth bypass in Kyverno
CVE-2026-122308
Kyverno before 1.19.2 contains an authorization bypass vulnerability in the Generation Handler that allows users with create/update permissions to trigger synchronized generate policies by spoofing internal generate.kyverno.io labels. Attackers can label a ConfigMap as managed-by kyverno with crafted policy, rule, and trigger labels to clone sensitive Secrets from restricted namespaces into their own namespace.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (14.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
References
- github.com/kyverno/kyverno/security/advisories/GHSA-hg5v-hwm3-956r (vendor-advisory)
- www.vulncheck.com/advisories/kyverno-before-1.19.2-label-spoofing-via-generatio… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-122308?
- CVE-2026-122308 is a high-severity vulnerability in Kyverno, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.5/10. Published 2026-11-05.
- How severe is CVE-2026-122308?
- High severity. CVSS v3 base score is 8.5 out of 10.