CVE-2026-49478 | BDVDB-2026-358802 Detail

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.

Impact#

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Exploit#

History#

1. Version 12026-08-13Record published in the CVE List.
2. Version 22026-08-15Most recent update recorded in the CVE List.