{"cve":"CVE-2025-57755","nvd":{"published":"2025-08-21T17:15:31.610","modified":"2026-06-17T09:43:22.417","status":"Deferred","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.","cvss_v4":{"vector":"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","score":8.1},"cvss_v3":null,"cwes":["CWE-200","CWE-942"],"references":["https://github.com/musistudio/claude-code-router/security/advisories/GHSA-8hmm-4crw-vm2c"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:07:46.309729541+00:00"},"epss":{"cve":"CVE-2025-57755","score":0.00305,"percentile":0.23322,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8hmm-4crw-vm2c","url":"https://osv.dev/vulnerability/GHSA-8hmm-4crw-vm2c","summary":"@musistudio/claude-code-router has improper CORS configuration","modified":"2025-08-21T20:12:20.629399Z","packages":[{"ecosystem":"npm","name":"@musistudio/claude-code-router","purl":"pkg:npm/%40musistudio/claude-code-router","ranges":["<1.0.34"],"fixed":["1.0.34"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}