medium6.4
CVE-2026-56678
9router: Kiro region injection allows authenticated SSRF with Authorization header forwarding
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | 9router | <= 0.5.2 | 0.5.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-6mwv-4mrm-5p3m
- https://github.com/decolua/9router/security/advisories/GHSA-6mwv-4mrm-5p3m
- https://nvd.nist.gov/vuln/detail/CVE-2026-56678
- https://github.com/decolua/9router/commit/126aa244c5b51b74ab8c7594e3418fcf4437bf6f
- https://github.com/decolua/9router/releases/tag/v0.5.6