CVE-2025-57755

claude-code-router CORS. misconfiguration

State: Published
Severity: 8.1 High
Published: Aug 21, 2025
Updated: Aug 21, 2025
Reserved: Aug 19, 2025

Description

claude-code-router is a powerful tool to route Claude Code requests to different models and customize any request. Due to improper Cross-Origin Resource Sharing (CORS) configuration, there is a risk that user API Keys or equivalent credentials may be exposed to untrusted domains. Attackers could exploit this misconfiguration to steal credentials, abuse accounts, exhaust quotas, or access sensitive data. The issue has been patched in v1.0.34.

Scores

CVSS	Score	Vector	Source
4.0	8.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U	GitHub_M

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-942 Permissive Cross-domain Policy with Untrusted Domains

Affected Products

Product	Versions
claude-code-routermusistudio	< 1.0.34Affected

References

https://github.com/musistudio/claude-code-router/security/advisories/GHSA-8hmm-4crw-vm2c

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.