CVE-2026-56675: high-severity vulnerability in decolua 9router
9router: Reverse proxy locality collapse allows unauthenticated access to 9router /v1 APIs
Published
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.3epss 0.5%
9Router is an AI router & token saver. Prior to 0.5.2, 9router treats loopback requests as trusted and allows /v1/* access without an API key, so a same-host reverse proxy that forwards public traffic to the backend through 127.0.0.1 causes src/dashboardGuard.js to misclassify external requests as local. A remote unauthenticated attacker can access /v1 APIs such as /v1/models and may abuse configured upstream provider credentials through /v1 proxy endpoints depending on enabled providers. This issue is fixed in version 0.5.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Affected products
decolua · 9routerRelated CVEs — decolua 9router
In the same product, most dangerous first.
CVE-2026-55638HIGH9router: Unauthenticated LLM proxy access via /codex rewrite authorization bypassEPSS 6.6%CVE-2026-46339CRITICAL9Router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routesEPSS 2.8%CVE-2026-59800CRITICAL9Router < 0.4.44 - OS Command Injection via sudoPassword Parameter in Tailscale Install EndpointEPSS 2.1%CVE-2026-56681HIGH9Router: Authentication Bypass in Public LLM API via Spoofable X-9r-Real-Ip HeaderEPSS 1.1%CVE-2026-63732CRITICAL9router before 0.4.60 Remote Code Execution via default passwordEPSS 1.0%CVE-2026-62312HIGH9Router: Authenticated RCE via Unvalidated MCP Plugin ArgumentsEPSS 0.9%