CVE-2025-59536: Claude Code can execute commands prior to the startup trust dialog

October 3, 2025 (updated November 10, 2025)

Due to a bug in the startup trust dialog implementation, Claude Code could be tricked to execute code contained in a project before the user accepted the startup trust dialog. Exploiting this requires a user to start Claude Code in an untrusted directory.

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!

References

github.com/advisories/GHSA-4fgq-fpq9-mr3g
github.com/anthropics/claude-code
github.com/anthropics/claude-code/security/advisories/GHSA-4fgq-fpq9-mr3g
nvd.nist.gov/vuln/detail/CVE-2025-59536

Code Behaviors & Features

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