Kyverno from 1.19.1 before 1.19.2 contains an authorization bypass vulnerability in the apiCall namespace clamp that allows namespace tenants to issue cross-namespace and cluster-scoped API requests by appending malformed percent-escapes to urlPath. Attackers can create namespaced Policies whose apiCall runs as the admission-controller ServiceAccount to read other namespaces' resources and create mutating webhooks, escalating to cluster admin.
Metrics
Affected Vendors & Products
Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Sun, 08 Nov 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Kyverno from 1.19.1 before 1.19.2 contains an authorization bypass vulnerability in the apiCall namespace clamp that allows namespace tenants to issue cross-namespace and cluster-scoped API requests by appending malformed percent-escapes to urlPath. Attackers can create namespaced Policies whose apiCall runs as the admission-controller ServiceAccount to read other namespaces' resources and create mutating webhooks, escalating to cluster admin. | |
| Title | Kyverno 1.19.1 Privilege Escalation via apiCall Namespace Clamp Bypass | |
| First Time appeared |
Kyverno
Kyverno kyverno |
|
| Weaknesses | CWE-441 | |
| CPEs | cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Kyverno
Kyverno kyverno |
|
| References |
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| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-08T13:15:33.723Z
Reserved: 2026-11-08T02:13:42.362Z
Link: CVE-2026-124440
No data.
Status : Received
Published: 2026-11-08T14:18:10.633
Modified: 2026-11-08T14:18:10.633
Link: CVE-2026-124440
No data.
OpenCVE Enrichment
Updated: 2026-11-08T14:30:16Z
Weaknesses