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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
anthropics / claude-code	affected < 1.0.111

CWE

CWE-601

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.