CVE-2026-24052 Claude Code has a Domain Validation Bypass which Allows Automatic Requests to Attacker-Controlled Domains
Attackers can bypass domain validation to force automatic requests to malicious domains, potentially exfiltrating data from users of the AI coding tool.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-24052?
CVE-2026-24052 is a high-severity vulnerability in anthropics claude-code, published on 3 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-601
Which versions are affected by CVE-2026-24052?
2 open source packages ship an affected version, including @anthropic-ai/claude-code. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
@anthropic-ai/claude-code npm | All versions | 1.0.111 |
@anthropic-ai/claude-code npm | All versions | 1.0.111 |
Products include Anthropic Claude Code.
How do I fix CVE-2026-24052?
Upgrade @anthropic-ai/claude-code to 1.0.111 or later.
Is CVE-2026-24052 being exploited?
There is no known exploitation of CVE-2026-24052 in the wild and no public exploit code.
Other vulnerabilities in anthropics claude-code
- CVE-2025-66032 Claude Code Command Validation Bypass Allows Arbitrary Code Execution
- CVE-2025-64755 @anthropic-ai/claude-code has Sed Command Validation Bypass that Allows Arbitrary File Writes
- CVE-2025-59536 Claude Code's startup trust dialog could lead to Command Execution attack
- CVE-2025-58764 Claude Code rg command had Command Injection that allowed bypass of user approval prompt for command execution
- CVE-2025-59041 Claude Code vulnerable to arbitrary code execution caused by maliciously configured git email
Sources
Also known as GHSA-vhw5-3g5m-8ggf.