CVE-2026-124440
- Source
- https://cve.org/CVERecord?id=CVE-2026-124440
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-124440.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-124440
- Aliases
-
- GHSA-39w8-hv5g-f73w
- Published
- 2026-11-08T13:15:33Z
- Modified
- 2026-11-10T02:45:32Z
- Severity
-
- 9.4 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
- Summary
- Kyverno 1.19.1 Privilege Escalation via apiCall Namespace Clamp Bypass
- Details
-
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.
- Database specific
{ "cna_assigner": "VulnCheck", "cwe_ids": [ "CWE-441" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/124xxx/CVE-2026-124440.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/124xxx/CVE-2026-124440.json
- https://github.com/kyverno/kyverno/security/advisories/GHSA-39w8-hv5g-f73w
- https://nvd.nist.gov/vuln/detail/CVE-2026-124440
- https://www.vulncheck.com/advisories/kyverno-1.19.1-privilege-escalation-via-apicall-namespace-clamp-bypass
Affected packages
Git / github.com/kyverno/kyverno
Affected ranges
- Type
- GIT
- Repo
- https://github.com/kyverno/kyverno
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "1.19.1" }, { "fixed": "1.19.2" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "introduced": "1.19.1" }, { "fixed": "1.19.2" } ], "source": "DESCRIPTION" } ] }