9Router: Authenticated Server-Side Request Forgery (SSRF) via OIDC Provider Test Endpoint

Date Aug 17, 2026

Type Vendor advisory

Signal High-risk advisory

Vendor / Product npm · 9router

CVE CVE-2026-56677

High-risk advisory CVE-2026-56677

Summary

9Router: Authenticated Server-Side Request Forgery (SSRF) via OIDC Provider Test Endpoint

Why it matters

GitHub has published a reviewed security advisory for 9router. Prioritize it with other application dependency updates.

Operator check

Check whether 9router is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

GitHub Advisory GHSA-8g4w-4ffg-8vgx NVD — CVE-2026-56677 Source reference

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

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