Claude Code echo command allowed bypass of user approval prompt for command execution

CRITICAL 9.8CVE-2025-54795 · GHSA-x56v-x2h6-7j34 · Published 05/08/2025 · updated 17/06/2026

Package	Affected versions	Patched versions
claude code anthropic	`< 1.0.20`	`1.0.20`
@anthropic-ai/claude-code npm	`< 1.0.20`	`1.0.20`

Description

Due to an error in command parsing, it was possible to bypass the Claude Code confirmation prompt to trigger execution of an untrusted command. Reliably exploiting this requires the ability to add untrusted content into a Claude Code context window.

Users on standard Claude Code auto-update received this fix automatically after release. Current users of Claude Code are unaffected, as versions prior to 1.0.24 are deprecated and have been forced to update.

Thank you to Elad Beber (Cymulate) for reporting this issue!

NVD description

Claude Code is an agentic coding tool. In versions below 1.0.20, an error in command parsing makes it possible to bypass the Claude Code confirmation prompt to trigger execution of an untrusted command. Reliably exploiting this requires the ability to add untrusted content into a Claude Code context window. This is fixed in version 1.0.20.

References

anthropics/claude-code security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2025-54795 · ADVISORY
anthropics/claude-code · PACKAGE

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