GO-2026-5853

Fulcio has OIDC Discovery Redirect Following Allows SSRF and JWKS Substitution for Meta-Issuer Paths, with Kubernetes Service-Account Token Leakage in github.com/sigstore/fulcio

At a glance

Published: 2026-07-07 15:26 UTC
Updated: 2026-07-10 18:29 UTC
CVE: CVE-2026-49478
Aliases: GHSA-f5mr-q85p-6hh6

Description

Fulcio has OIDC Discovery Redirect Following Allows SSRF and JWKS Substitution for Meta-Issuer Paths, with Kubernetes Service-Account Token Leakage in github.com/sigstore/fulcio

Affected packages

Package	Versions
Go · github.com/sigstore/fulcio	introduced 0, fixed 1.8.6

References

https://github.com/sigstore/fulcio/security/advisories/GHSA-f5mr-q85p-6hh6 ADVISORY

Sources

Source	Licence
OSV.dev	CC-BY 4.0 — Go Vulnerability Database