What’s Vulnerable › Vulnerabilities

CVE-2026-56675: 9router: Reverse proxy locality collapse allows unauthenticated access to 9router /v1 APIs

• Severity: high (CVSS 8.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-10 · updated 2026-10-25
• Weakness: CWE-287

Description

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.

Affected products

• decolua 9router: before 0.5.2

References

• https://github.com/decolua/9router/commit/da667836cc7584bea0edd893de1d590c9ea279dc
• https://github.com/decolua/9router/releases/tag/v0.5.2
• https://github.com/decolua/9router/security/advisories/GHSA-x5c9-v98j-722r

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