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


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.28% (19th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-GOLANGGITHUBSIGSTOREFULCIO-18321493
  • 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?

There is no fixed version for Echo:latest golang-github-sigstore-fulcio.

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 Echo. See How to fix? for Echo:latest 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