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    CVE-2026-55641

    9Router is an AI router & token saver. Prior to 0.5.2, 9router determines whether a /v1 LLM proxy request is local by reading the client-controlled Host header, allowing a remote unauthenticated attacker to send Host: localhost and bypass API-key authentication. In the default configuration, this exposes the /v1 proxy to upstream provider calls using stored provider credentials and allows /v1/search with the searxng provider_options.baseUrl parameter to drive server-side requests to internal or cloud-metadata hosts. This issue is fixed in version 0.5.2.

    Published:Jul 10, 2026
    Last Modified:Jul 10, 2026
    EPS:Jul 10, 2026
    EPSS Score:
    CVSS Score:8.2

    Affected Products

    Vendor
    Decolua
    Product
    9router

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs
    CAPEC-141 Cache Poisoning
    CAPEC-142 DNS Cache Poisoning
    CAPEC-21 Exploitation of Trusted Identifiers
    CAPEC-22 Exploiting Trust in Client
    CAPEC-459 Creating a Rogue Certification Authority Certificate
    CAPEC-461 Web Services API Signature Forgery Leveraging Hash Function Extension Weakness
    CAPEC-473 Signature Spoof
    CAPEC-476 Signature Spoofing by Misrepresentation
    CAPEC-59 Session Credential Falsification through Prediction
    CAPEC-60 Reusing Session IDs (aka Session Replay)
    CAPEC-664 Server Side Request Forgery
    CAPEC-667 Bluetooth Impersonation AttackS (BIAS)
    CAPEC-73 User-Controlled Filename
    CAPEC-76 Manipulating Web Input to File System Calls
    CAPEC-85 AJAX Footprinting
    CAPEC-94 Adversary in the Middle (AiTM)

    Related CVEs

    CVE-2026-72860 (CVSS 6.3) — The POST /api/provider-nodes/validate route in 9router takes a caller-supplied baseUrl and issues server-side …
    CVE-2026-56677 (CVSS 8.6) — 9Router is an AI router & token saver. In 0.5.4 and earlier, the POST /api/auth/oidc/test endpoint in src/app/…
    CVE-2026-63732 (CVSS 9.4) — 9router 0.4.59 (fixed in 0.4.60) contains a chain of vulnerabilities: a hardcoded default password (123456) th…
    CVE-2026-63313 (CVSS 8.3) — 9Router before 0.4.72 contains a server-side request forgery (SSRF) vulnerability in the /v1/web/fetch endpoin…
    CVE-2026-62312 (CVSS 8.8) — 9Router is an AI router & token saver. Prior to 0.5.2, 9Router allows a remote authenticated attacker to achie…
    CVE-2026-56678 (CVSS 6.4) — 9Router is an AI router & token saver. Prior to 0.5.6, the Kiro API-key validation endpoint POST /api/oauth/ki…
    CVE-2026-56679 (CVSS 8.7) — 9Router is an AI router & token saver. Prior to 0.5.4, the PATCH /api/settings endpoint writes the entire requ…
    CVE-2026-49353 (CVSS 7.5) — 9Router is an AI router & token saver. In 0.4.45 and earlier, 9Router's src/dashboardGuard.js local-only acces…
    CVE-2026-49352 (CVSS 9.8) — 9Router is an AI router & token saver. From 0.2.21 until 0.4.44, 9Router used the hardcoded fallback JWT secre…
    CVE-2026-46339 (CVSS 10) — 9Router is an AI router & token saver. From 0.4.30 until 0.4.37, 9Router's src/proxy.js middleware did not pro…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High