CVE-2026-122304

EUVD-2026-117215
Kyverno from 1.17.0 before 1.19.2 contains an authorization bypass vulnerability that allows namespace admins to escape namespace confinement because the cleanup controller builds its context loader with a nil policy. Attackers can create a namespaced CleanupPolicy with apiCall or globalReference context entries to read cross-namespace Secrets and modify validatingwebhookconfigurations using the cleanup controller's ServiceAccount.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
9.9 CRITICAL
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 33.52%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
kyvernokyverno
1.17.0 ≤
𝑥
< 1.19.2
CNA
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://github.com/kyverno/kyverno/security/advisories/GHSA-p58h-r4j3-h5vx
https://github.com/kyverno/kyverno/security/advisories/GHSA-rcxg-3f92-3mgr
https://www.vulncheck.com/advisories/kyverno-1.17.0-before-1.19.2-privilege-escalation-via-cleanuppolicy-context-loader