by Kastro
Paper/Archive/CVE-2026-62327

CVE-2026-62327

decolua 9Router — 9Router 0.4.41 - Unauthenticated API Key Exposure via /api/usage/stats

EPSS 6%public exploitCVSS 9.3
critical.is priorityof 100
57
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 93.6.936 × 2018.7Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
9Router≤ 0.4.41–CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/decolua/9router/security/advisories/GHSA-vjc7-jrh9-9j86writeupvulncheck.com/advisories/9router-unauthenticated-api-key-exposure-via-api-usage-stats