SB2026043048 - OS Command Injection in Claude Code
Published: April 30, 2026
Security Bulletin ID
SB2026043048
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) OS Command Injection (CVE-ID: CVE-2025-54795)
The vulnerability allows a remote attacker to execute arbitrary commands.
The vulnerability exists due to command injection in the echo command parser when processing untrusted content in a Claude Code context window. A remote attacker can add crafted untrusted content to bypass the confirmation prompt and execute arbitrary commands.
Reliable exploitation requires the ability to add untrusted content into a Claude Code context window.
Remediation
Install update from vendor's website.