{"id":"CVE-2026-100705","summary":"Kyverno before 1.19.1 SSRF via legacy apiCall service executor","details":"Kyverno before 1.19.1 is vulnerable to server-side request forgery. The default egress blocklist (169.254.169.254, 169.254.169.253, metadata.google.internal, 127.0.0.0/8, ::1/128) and the scoped-token control were wired only into the new CEL http.Get/Post library and were never applied to the legacy apiCall service executor (pkg/engine/apicall/executor.go) or to the GlobalContextEntry external-API path, which handle every non-CEL context[].apiCall.service call. Because these paths use a plain net/http client with no egress filtering and no validation of the configured service URL, a ClusterPolicy or GlobalContextEntry author — or, where a deployed policy templates the service URL from the admission resource, a lower-privileged resource submitter — can cause Kyverno to issue GET/POST requests to an arbitrary host, including the cloud metadata endpoint, loopback, and any in-cluster service, reading cloud instance credentials and reaching internal endpoints with Kyverno's network position. The executor also unconditionally attaches Kyverno's projected ServiceAccount token to the attacker-chosen destination; the token is audience-scoped, limiting its replay value. Fixed in 1.19.1.","aliases":["GHSA-q825-p383-r9v5"],"modified":"2026-09-28T03:48:30.841119460Z","published":"2026-09-26T13:23:59.999Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100705.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100705.json"},{"type":"ADVISORY","url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-q825-p383-r9v5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100705"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.1-ssrf-via-legacy-apicall-service-executor"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kyverno/kyverno","events":[{"introduced":"0"},{"fixed":"40ec788d48bb28d83dbf85538e962a59db9d45c6"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION"],"extracted_events":[{"introduced":"0"},{"fixed":"1.19.1"}]}}],"versions":["v1.19.1-rc.1","v1.19.0","kyverno-policies-chart-3.9.0","kyverno-chart-3.9.0","v1.19.0-rc.4","kyverno-policies-chart-3.9.0-rc.4","kyverno-chart-3.9.0-rc.4","v1.19.0-rc.3","kyverno-policies-chart-3.9.0-rc.3","kyverno-chart-3.9.0-rc.3","v1.19.0-rc.2","kyverno-policies-chart-3.9.0-rc.2","kyverno-chart-3.9.0-rc.2","v1.19.0-rc.1","kyverno-policies-chart-3.9.0-rc.1","kyverno-chart-3.9.0-rc.1","1.9-dev","1.8-dev","1.7-dev","test-dev","1.6-dev","helm-chart-v2.1.3","v1.5.0-rc1","helm-chart-v2.1.0","v1.4.3","helm-chart-v2.0.3","v1.4.3-rc2","helm-chart-v2.0.3-rc2","v1.4.3-rc1","helm-chart-v2.0.3-rc1","v1.4.2","v1.4.2-rc4","v1.4.2-rc3","v1.4.2-rc2","v1.4.2-rc1","v1.4.1","v1.4.0-rc4","v1.4.0","v1.4.0-rc3","v1.4.0-rc2","v1.4.0-rc1","v1.3.6","v1.3.6-rc5","v1.3.6-rc4","v1.3.6-rc3","v1.3.6-rc2","v1.3.6-rc1","v1.3.5","v1.3.5-rc5","v1.3.5-rc4","v1.3.5-rc3","v1.3.5-rc2","v1.3.5-rc1","v1.3.4","v1.3.4-rc1","v1.3.3","v1.3.2","v1.3.2-rc3","v1.3.2-rc2","v1.3.2-rc1","v1.3.1","v1.3.0","v1.3.0-rc12","v1.3.0-rc11","v1.3.0-rc10","1.3.0-rc10","v1.3.0-rc9","v1.3.0-rc8","v1.3.0-rc7","v1.3.0-rc6","v1.3.0-rc5","v1.3.0-rc4","v1.3.0-rc3","v1.3.0-rc2","v1.3.0-rc1","v1.2.1","v1.2.0","v1.1.12","v1.1.11","v1.1.10","v1.1.9","v1.1.8","v1.1.7","v1.1.7-rc4","v1.1.7-rc3","v1.1.7-rc2","v1.1.7-rc1","v1.1.6","v1.1.6-rc5","v1.1.6-rc4","v1.1.6-rc3","v1.1.6-rc2","v1.1.6-rc1","v1.1.5","v1.1.4","v1.1.4-rc1","v1.1.3","v1.1.3-rc1","v1.1.2","v1.1.1","v1.0.0","v1.0.0-rc1","v0.11.0","v0.10.0","v0.9.1","v0.9.0","v0.8.0","v0.7.1","v0.7.0","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100705.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N"}]}