{"cve":"CVE-2026-41323","nvd":{"published":"2026-04-24T04:16:20.593","modified":"2026-06-17T10:46:30.423","status":"Analyzed","description":"Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4, Kyverno's apiCall feature in ClusterPolicy automatically attaches the admission controller's ServiceAccount token to outgoing HTTP requests. The service URL has no validation — it can point anywhere, including attacker-controlled servers. Since the admission controller SA has permissions to patch webhook configurations, a stolen token leads to full cluster compromise. Versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4 patch the issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","score":9.1},"cwes":["CWE-200","CWE-918"],"references":["https://github.com/kyverno/kyverno/commit/bc4f91c4801b1eaa2edc0a14e2f1b0af8cf0c1f5","https://github.com/kyverno/kyverno/commit/c2eab00033e635bda4e4efb58c1b472b41728bb6","https://github.com/kyverno/kyverno/commit/f70e8ac1e7acd2e3844f9553e4a884f07f953de0","https://github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4","https://github.com/kyverno/kyverno/security/advisories/GHSA-f9g8-6ppc-pqq4"],"products":["kyverno:kyverno"],"source":"nvd","synced_at":"2026-10-19T22:33:09.003606135+00:00"},"epss":{"cve":"CVE-2026-41323","score":0.0056,"percentile":0.46622,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-f9g8-6ppc-pqq4","url":"https://osv.dev/vulnerability/GHSA-f9g8-6ppc-pqq4","summary":"Kyverno: ServiceAccount token leaked to external servers via apiCall service URL","modified":"2026-09-10T03:51:01.659888553Z","packages":[{"ecosystem":"Go","name":"github.com/kyverno/kyverno","purl":"pkg:golang/github.com/kyverno/kyverno","ranges":["<1.17.0"],"fixed":["1.17.0"]}]},{"id":"GO-2026-5351","url":"https://osv.dev/vulnerability/GO-2026-5351","summary":"Kyverno: ServiceAccount token leaked to external servers via apiCall service URL in github.com/kyverno/kyverno","modified":"2026-06-25T19:56:36.059134840Z","packages":[{"ecosystem":"Go","name":"github.com/kyverno/kyverno","purl":"pkg:golang/github.com/kyverno/kyverno","ranges":["<1.17.0"],"fixed":["1.17.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}