9Router 0.4.41 - Unauthenticated API Key Exposure via /api/usage/stats
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass, Information disclosure
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306 and CWE-522.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
decolua 9Router — GitHub Security Advisory (GHSA-vjc7-jrh9-9j86)
3 records Highest priority Priority HIGH 3 HIGH
Other records, highest priority first
- TI-2026-42622 9Router 0.4.41 - Unauthenticated API Exposure via /api/providersPriority HIGH 81
- TI-2026-44500 9Router 0.4.41 - Unauthenticated Information Disclosure via API Usage EndpointsPriority HIGH 77
Timeline
- 2026-10-02 Threatist record created from CVE-2026-62327
- 2026-10-03 Alias added: GHSA-7gvh-h32g-9cfw
- 2026-10-21 EPSS moved to the 50th–90th percentile
- 2026-10-25 EPSS moved to the 90th–95th percentile
References
More decolua vulnerabilities
- TI-2026-36526 9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass CVSS 3.1CRITICAL 9.8
- TI-2026-34059 9Router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routes CVSS 3.1CRITICAL 10.0
- TI-2026-42622 9Router 0.4.41 - Unauthenticated API Exposure via /api/providers CVSS 4.0CRITICAL 9.3
- TI-2026-44500 9Router 0.4.41 - Unauthenticated Information Disclosure via API Usage Endpoints CVSS 4.0HIGH 8.7
- TI-2026-40860 9Router: Authenticated Server-Side Request Forgery (SSRF) via OIDC Provider Test Endpoint CVSS 3.1HIGH 8.6
- TI-2026-40165 9router: Unauthenticated LLM proxy access via /codex rewrite authorization bypass CVSS 3.1HIGH 8.6
Sources
- CVE-2026-62327 · CVE Program
- CVE-2026-62327 · NVD
- FIRST EPSS
- GHSA-7gvh-h32g-9cfw · GitHub Advisory Database · CC BY 4.0
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