CVE-2026-24052 — Claude Code has a Domain Validation Bypass which Allows Automatic Requests to Attacker-Controlled Domains
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 requ…
Published: 2026-02-03 · CVSS: 7.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7