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CVE-2026-124440 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:9.9 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/kyverno/kyverno/security/advisories/GHSA-39w8-hv5g-f73w	[email protected]
https://www.vulncheck.com/advisories/kyverno-1.19.1-privilege-escalation-via-apicall-namespace-clamp-bypass	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-441	Unintended Proxy or Intermediary ('Confused Deputy')	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

1 change record found show changes