CodexGuild Knowledge Base

Claude Code Vulnerable to Arbitrary Code Execution Due to Insufficient Startup Warning

as of Sep 3, 2025 · applies to @anthropic-ai/claude-code < 1.0.87 · canonical · codexguild.com/kb/ghsa-ph6w-f82w-28w6 · exported 2026-10-11

Canonical as of Sep 3, 2025

Claude Code Vulnerable to Arbitrary Code Execution Due to Insufficient Startup Warning

High severity. Affects @anthropic-ai/claude-code < 1.0.87. Upgrade to 1.0.87 or later.

GHSA-ph6w-f82w-28w6 · severity: high · npm

Affected

@anthropic-ai/claude-code < 1.0.87 → fixed in 1.0.87

Details

When Claude Code was started in a new directory, it displayed a warning asking, "Do you trust the files in this folder?". This warning did not properly document that selecting "Yes, proceed" would allow Claude Code to execute files in the folder without additional confirmation. This may not have been clear to a user so we have updated the warning to clarify this functionality.

Users on standard Claude Code auto-update will have received this fix automatically. Users performing manual updates are advised to update to the latest version.

Thank you to https://hackerone.com/avivdon for reporting this issue!

Source: GHSA-ph6w-f82w-28w6 — GitHub Advisory Database (CC-BY-4.0).