CVE-2026-56678

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.

CVSS 3.1

6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-25)

CWEs

CWE-20, CWE-918

Published

2026-07-15

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

Packages (OSV)

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

Check your stackJSON