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

CVE ID : CVE-2026-24052

Published : Feb. 3, 2026, 8:49 p.m. | 28 minutes ago

Description : 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.

Severity: 0.0 | NA

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