SB2026043032 - OS Command Injection in Claude Code
Published: April 30, 2026
Security Bulletin ID
SB2026043032
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-2026-25723)
The vulnerability allows a remote attacker to execute arbitrary commands and write files outside intended restrictions.
The vulnerability exists due to command injection in the piped sed command handling in Claude Code when processing commands that use piped sed operations with the echo command. A remote attacker can send a specially crafted command to execute arbitrary commands and write files outside intended restrictions.
Exploitation requires the ability to execute commands through Claude Code with the "accept edits" feature enabled.
Remediation
Install update from vendor's website.