{"items":[{"id":"NVI-00013984","kind":"vulnerability","title":"9router: Unauthenticated LLM proxy access via /codex rewrite authorization bypass","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-8gmq-j984-vp4r","CVE-2026-55638"],"plain_summary":"GitHub lists this reviewed advisory for 9router. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2d0af93b36bafaabc73c8be7bbbd810e"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-28T18:32:02.000Z","value":"8.6 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2d0af93b36bafaabc73c8be7bbbd810e"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-2d0af93b36bafaabc73c8be7bbbd810e","url":"https://github.com/advisories/GHSA-8gmq-j984-vp4r","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-8gmq-j984-vp4r","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T09:56:23.004Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2d0af93b36bafaabc73c8be7bbbd810e"],"technology":"9router","known_exclusions":[],"conditions_summary":"## Summary\n\n9router exposes an OpenAI/Anthropic-compatible LLM proxy. Remote access to this proxy is intended to be protected by an API-key check in the Next.js middleware.\n\nHowever, 9router also defines a rewrite that maps `/codex/*` to the backend LLM endpoint `/api/v1/responses`. The middleware authorization decision is made on the incoming request path before the rewrite is applied. Because `/codex` is not included in the middleware's protected LLM API prefix list, requests to `/codex/*` bypass the API-key gate and are later rewritten to the same backend used by `/api/v1/responses`.\n\nAs a result, an unauthenticated remote attacker can access the LLM proxy through `/codex/*` and cause the server to make upstream provider calls using the operator-stored LLM provider credentials.\n\n## Details\n\n| Component                     | File                                | Note                                                                      |\n| ----------------------------- | ----------------------------------- | ------------------------------------------------------------------------- |\n| Middleware authorization gate | `src/dashboardGuard.js`             | Protects `/v1`, `/v1beta`, ","public_affected_ranges":["< 0.5.2"]}],"null_published_at":"2026-11-02T10:00:37.194Z","source_updated_at":"2026-08-28T18:32:02.000Z","source_disclosed_at":"2026-08-28T18:32:01.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-02T09:56:23.004Z"}],"next_cursor":null,"snapshot_revision":"42594"}