HIGH

GHSA-x56v-x2h6-7j34

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

Quick fix

GHSA-x56v-x2h6-7j34 — @anthropic-ai/claude-code: upgrade to the fixed version with the command below.

npm install @anthropic-ai/claude-code@1.0.20

Details

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!

Are you affected?

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Affected packages

npm/@anthropic-ai/claude-code

Introduced in: 0Fixed in: 1.0.20

Fixnpm install @anthropic-ai/claude-code@1.0.20

References

https://github.com/anthropics/claude-code/security/advisories/GHSA-x56v-x2h6-7j34[WEB]
https://nvd.nist.gov/vuln/detail/CVE-2025-54795[ADVISORY]
https://github.com/anthropics/claude-code[PACKAGE]