Coding Tool Vulnerability in Claude Code by Anthropic

CVE-2026-21852

What is CVE-2026-21852?

A vulnerability in Claude Code allowed malicious repositories to exfiltrate sensitive user data, including Anthropic API keys, before users could confirm trust. Attackers could leverage a compromised repository to adjust the configuration to point to their own server. Once the repository was opened by the user, Claude Code would automatically attempt to connect and issue API requests without displaying the necessary trust prompt, risking exposure of user credentials. Users should ensure they are using version 2.0.65 or later to mitigate this risk.

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References