{"id":"CVE-2026-49478","revision":"bf2a025400ac4c3ea5830adf39d65784","records":[{"revision":"bf2a025400ac4c3ea5830adf39d65784","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-49478","aliases":[],"title":"Fulcio has OIDC Discovery Redirect Following Allows SSRF and JWKS Substitution for Meta-Issuer Paths, with Kubernetes Service-Account Token Leakage","description":"Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Versions through 1.8.5 improperly follow cross-host redirects and attach Kubernetes ServiceAccount tokens during OIDC discovery, allowing a malicious or compromised issuer to perform blind SSRF, substitute and cache malicious JWKS keys, or disclose ServiceAccount tokens to external hosts. Version 1.8.6 blocks cross-host redirects, restricts token injection, and restricts local token loading. No known workarounds are available.","state":0,"publishedAt":"2026-08-13T13:08:21.498+00:00","modifiedAt":"2026-08-15T03:14:47.189+00:00","affected":[{"ecosystem":"Vendor product","name":"fulcio","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"sigstore\",\n                    \"product\": \"fulcio\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.8.6\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","score":8.7,"severity":"HIGH"}],"references":["https://github.com/sigstore/fulcio/security/advisories/GHSA-f5mr-q85p-6hh6","https://github.com/sigstore/fulcio/pull/2354","https://github.com/sigstore/fulcio/commit/378c654f48c3bafdced04ead7010aab2cb4c6ca1","https://github.com/sigstore/fulcio/releases/tag/v1.8.6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-49478","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-49478","identifiers":["CVE-2026-49478"]},"retained":false,"historicalAffected":[]}],"coverage":[]}