golang-github-sigstore-fulcio: Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity
CVE-2026-49478 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-49478, released July 27, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| golang-github-sigstore-fulcio · Debian 14 | 1.8.7-1 | DEBIAN-CVE-2026-49478 | Jul 27, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | OPENSUSE-SU-2026:21483-1 | Jul 30, 2026 |
| runfinch-finch · amzn 2023 | 1.17.2-1.amzn2023.0.3 | ALAS2023-2026-2023 | Aug 3, 2026 |
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