Fulcio has OIDC Discovery Redirect Following Allows SSRF and JWKS Substitution for Meta-Issuer Paths, with Kubernetes...
High-risk advisory
CVE-2026-49478
Summary
Fulcio has OIDC Discovery Redirect Following Allows SSRF and JWKS Substitution for Meta-Issuer Paths, with Kubernetes Service-Account Token Leakage
Why it matters
GitHub has published a reviewed security advisory for github.com/sigstore/fulcio. Prioritize it with other application dependency updates.
Operator check
Check whether github.com/sigstore/fulcio is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.