{"id":"CVE-2026-100705","state":"PUBLISHED","title":"Kyverno before 1.19.1 SSRF via legacy apiCall service executor","description":"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.","publishedAt":"2026-09-26T13:23:59.999Z","updatedAt":"2026-09-26T23:10:45.970Z","severity":{"score":8.3,"label":"High","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["kyverno kyverno"],"affected":[{"vendor":"kyverno","product":"kyverno","packageURL":"pkg:golang/github.com/kyverno/kyverno","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.19.1","versionType":"semver"},{"version":"1.19.1","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/kyverno/kyverno/security/advisories/GHSA-q825-p383-r9v5","https://www.vulncheck.com/advisories/kyverno-before-1.19.1-ssrf-via-legacy-apicall-service-executor"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/100xxx/CVE-2026-100705.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-100705","state":"PUBLISHED","datePublished":"2026-09-26T13:23:59.999Z","dateUpdated":"2026-09-26T23:10:45.970Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-26T02:39:50.973Z"},"containers":{"cna":{"title":"Kyverno before 1.19.1 SSRF via legacy apiCall service executor","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"kyverno","product":"kyverno","packageURL":"pkg:golang/github.com/kyverno/kyverno","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.19.1","versionType":"semver"},{"version":"1.19.1","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/kyverno/kyverno/security/advisories/GHSA-q825-p383-r9v5","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-q825-p383-r9v5)"},{"url":"https://www.vulncheck.com/advisories/kyverno-before-1.19.1-ssrf-via-legacy-apicall-service-executor","name":"VulnCheck Advisory: Kyverno before 1.19.1 SSRF via legacy apiCall service executor","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":8.3,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":7.6,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-26T13:23:59.999Z"},"datePublic":"2026-09-10T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*","versionEndExcluding":"1.19.1"}]}]}],"credits":[{"lang":"en","value":"ttzero25","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-26T23:10:38.587553Z","id":"CVE-2026-100705","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-26T23:10:45.970Z"}}]}}}