CVE-2026-24052

CVE-2026-24052 · Claude Code has a Domain Validation Bypass which Allows Automatic Requests to Attacker-Controlled Domains

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Claude Code is an agentic coding tool. Prior to version 1.0.111, Claude Code contained insufficient URL validation in its trusted domain verification mechanism for WebFetch requests. The application used a startsWith() function to validate trusted domains (e.g., docs.python.org, modelcontextprotocol.io), this could have enabled attackers to register domains like modelcontextprotocol.io.example.com that would pass validation. This could enable automatic requests to attacker-controlled domains without user consent, potentially leading to data exfiltration. This issue has been patched in version 1.0.111.

CVSS 7.1 · High · EPSS 0.4% · Fix available

Published

2026-02-03T20:49:41.997Z

Updated

2026-02-04T20:00:11.786Z

Stack: node

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