{"id":"DEBIAN-CVE-2026-49478","details":"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.","modified":"2026-09-10T08:47:28.056696311Z","published":"2026-08-13T13:19:09.790Z","upstream":["CVE-2026-49478"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-49478"}],"affected":[{"package":{"name":"golang-github-sigstore-fulcio","ecosystem":"Debian:13","purl":"pkg:deb/debian/golang-github-sigstore-fulcio?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.5-1","1.7.1-1","1.8.5-1","1.8.7-1","1.8.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49478.json"}},{"package":{"name":"golang-github-sigstore-fulcio","ecosystem":"Debian:14","purl":"pkg:deb/debian/golang-github-sigstore-fulcio?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.7-1"}]}],"versions":["1.6.5-1","1.7.1-1","1.8.5-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49478.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N"}]}