Server-Side Request Forgery (SSRF) Affecting golang-github-sigstore-fulcio package, versions <1.8.7-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.28% (19th percentile)

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  • Snyk IDSNYK-DEBIAN14-GOLANGGITHUBSIGSTOREFULCIO-18322074
  • published27 Jul 2026
  • disclosed13 Aug 2026

Introduced: 27 Jul 2026

CVE-2026-49478  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade Debian:14 golang-github-sigstore-fulcio to version 1.8.7-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream golang-github-sigstore-fulcio package and not the golang-github-sigstore-fulcio package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1