CVE-2026-24052

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.

Score

CVSS 3.1 7.4 High

Status

Analyzed - security-advisories@github.com

Published

2026-02-03

Last modified

2026-02-04

Weaknesses

CWE-601

Affected products

• Claude Code (Anthropic)
• Claude-code (Anthropics)

References

• https://github.com/anthropics/claude-code/security/advisories/GHSA-vhw5-3g5m-8ggf