What’s Vulnerable › Vulnerabilities

CVE-2026-56678: 9Router: Kiro region injection allows authenticated SSRF with Authorization header forwarding

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-15 · updated 2026-10-24
• Weakness: CWE-20

Description

9Router is an AI router & token saver. Prior to 0.5.6, the Kiro API-key validation endpoint POST /api/oauth/kiro/api-key builds an upstream URL using a user-controlled region value, allowing an authenticated attacker to supply a crafted region such as kiro-canary.local:8443# and cause 9Router to send the Kiro validation request to an attacker-controlled host while forwarding the submitted Kiro API key as an Authorization header. This issue is fixed in version 0.5.6.

Affected products

• decolua 9router: before 0.5.6

References

• https://github.com/decolua/9router/commit/126aa244c5b51b74ab8c7594e3418fcf4437bf6f
• https://github.com/decolua/9router/releases/tag/v0.5.6
• https://github.com/decolua/9router/security/advisories/GHSA-6mwv-4mrm-5p3m
• https://github.com/decolua/9router/security/advisories/GHSA-6mwv-4mrm-5p3m

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