9router /v1 APIs has unauthenticated access via reverse proxy locality collapse
High-risk advisory
CVE-2026-56675
Summary
9router /v1 APIs has unauthenticated access via reverse proxy locality collapse
Why it matters
GitHub has published a reviewed security advisory for 9router. Prioritize it with other application dependency updates, especially because EPSS places it in the 42% percentile.
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. EPSS probability: 0.5%; percentile: 42%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.