CVE-2026-122304
Kyverno 1.17.0 before 1.19.2 Privilege Escalation via CleanupPolicy Context Loader
CVSS Score
9.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-863 |
| Vendor | kyverno |
| Product | kyverno |
| Published | Nov 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
kyverno / kyverno
1.17.0 < 1.19.2
References
github.com: https://github.com/kyverno/kyverno/security/advisories/GHSA-p58h-r4j3-h5vx github.com: https://github.com/kyverno/kyverno/security/advisories/GHSA-rcxg-3f92-3mgr vulncheck.com: https://www.vulncheck.com/advisories/kyverno-1.17.0-before-1.19.2-privilege-escalation-via-cleanuppolicy-context-loader
Credits
euriconicacio thevilledev