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TI-2025-35640 Aliases CVE-2025-57755GHSA-8hmm-4crw-vm2c

claude-code-router CORS. misconfiguration

Priority MEDIUM 43CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00305 23rd percentileScored 2026-11-07
Fix Fixed claude-code-router (musistudio): 1.0.34@musistudio/claude-code-router (npm): 1.0.34

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
musistudioclaude-code-routerbefore 1.0.341.0.34Patch availableCNA
—@musistudio/claude-code-router (npm)before 1.0.341.0.34Patch availableGHSA-8hmm-4crw-vm2c
  • claude-code-router Vendormusistudio Affected before 1.0.34 Fixed in 1.0.34 Patch available CNA
  • @musistudio/claude-code-router (npm) Vendor— Affected before 1.0.34 Fixed in 1.0.34 Patch available GHSA-8hmm-4crw-vm2c

Remediation

  • Fix · CNA claude-code-router (musistudio) Fixed in 1.0.34
  • Fix · GHSA-8hmm-4crw-vm2c @musistudio/claude-code-router (npm) Fixed in 1.0.34 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-57755
  2. 2026-10-03 Alias added: GHSA-8hmm-4crw-vm2c

References

Advisory 1

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences