This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-49478 →

DEBIAN-CVE-2026-49478

Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Versions through 1.8.5 improperly follo...

Original description

The description as published by the source.

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: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:13 golang-github-sigstore-fulcio

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 golang-github-sigstore-fulcio

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.7-1"}]}]

References

advisory security-tracker.debian.org