CVE-2026-49478

Fulcio (certificate authority for OpenID Connect) reports a vulnerability in OIDC discovery across versions up to 1.8.5 where cross-host redirects attach Kubernetes ServiceAccount tokens, enabling blind SSRF, JWKS key substitution/poisoning, and potential leakage of tokens to external hosts. The ...

CVE-2026-49478 Fulcio has OIDC Discovery Redirect Following Allows SSRF and JWKS Substitution for Meta-Issuer Paths, with Kubernetes Service-Account Token Leakage

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...

CVE-2026-49478 Fulcio has OIDC Discovery Redirect Following Allows SSRF and JWKS Substitution for Meta-Issuer Paths, with Kubernetes Service-Account Token Leakage

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...