Fedify has an incomplete SSRF mitigation after GHSA-p9cg-vqcc-grcx: validatePublicUrl allows special-use IPv4 ranges

Date Jul 14, 2026

Type Vendor advisory

Signal High-risk advisory

Vendor / Product npm · @fedify/fedify

CVE CVE-2026-50131

High-risk advisory CVE-2026-50131

Summary

Fedify has an incomplete SSRF mitigation after GHSA-p9cg-vqcc-grcx: validatePublicUrl allows special-use IPv4 ranges

Why it matters

GitHub has published a reviewed security advisory for @fedify/fedify. Prioritize it with other application dependency updates, especially because EPSS places it in the 19% percentile.

Operator check

Check whether @fedify/fedify is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.3%; percentile: 19%.

Sources

GitHub Advisory GHSA-xw9q-2mv6-9fr8 NVD — CVE-2026-50131 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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