{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49478","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-05-30T04:17:43.095Z","datePublished":"2026-08-13T13:08:21.498Z","dateUpdated":"2026-08-15T03:14:47.189Z"},"containers":{"cna":{"title":"Fulcio has OIDC Discovery Redirect Following Allows SSRF and JWKS Substitution for Meta-Issuer Paths, with Kubernetes Service-Account Token Leakage","problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/sigstore/fulcio/security/advisories/GHSA-f5mr-q85p-6hh6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/sigstore/fulcio/security/advisories/GHSA-f5mr-q85p-6hh6"},{"name":"https://github.com/sigstore/fulcio/pull/2354","tags":["x_refsource_MISC"],"url":"https://github.com/sigstore/fulcio/pull/2354"},{"name":"https://github.com/sigstore/fulcio/commit/378c654f48c3bafdced04ead7010aab2cb4c6ca1","tags":["x_refsource_MISC"],"url":"https://github.com/sigstore/fulcio/commit/378c654f48c3bafdced04ead7010aab2cb4c6ca1"},{"name":"https://github.com/sigstore/fulcio/releases/tag/v1.8.6","tags":["x_refsource_MISC"],"url":"https://github.com/sigstore/fulcio/releases/tag/v1.8.6"}],"affected":[{"vendor":"sigstore","product":"fulcio","versions":[{"version":"< 1.8.6","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-13T13:08:21.498Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-f5mr-q85p-6hh6","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-15T03:14:38.396830Z","id":"CVE-2026-49478","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-15T03:14:47.189Z"}}]}}