CVE-2025-65099highCode execution2025-11-19
CVE-2025-65099: Claude Code vulnerable to command execution prior to startup trust dialog
When using Claude Code with Yarn installed, Yarn config files can trigger code execution when running yarn --version.
What it is
When using Claude Code with Yarn installed, Yarn config files can trigger code execution when running yarn --version. This could lead to a bypass of the directory trust dialog in Claude Code, as plugins and yarnPath could be executed prior to the user accepting the risks of working 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.
How to check
- Affected: @anthropic-ai/claude-code (npm) < 1.0.39.
- Compare your installed version with the range above (command below).
How to fix
- Upgrade @anthropic-ai/claude-code to 1.0.39 or later.
npm ls @anthropic-ai/claude-code -g # or: claude --versionSources
More advisories for this tool
- highCVE-2026-86063: Claude Code: Plugin Hash Pin Bypass Allows Bypass of Hash Pinning
- highCVE-2026-55607: Claude Code: Sandbox Escape via Git Worktree Path Confusion Allows Unsandboxed Code Execution
- highCVE-2026-40068: Claude Code: Trust Dialog Bypass via Git Worktree Spoofing Allows Arbitrary Code Execution
- highCVE-2026-39861: Claude Code: Sandbox Escape via Symlink Following Allows Arbitrary File Write Outside Workspace