SB2026043047 - Code Injection in Claude Code
Published: April 30, 2026
Security Bulletin ID
SB2026043047
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 vulnerability.
1) Code Injection (CVE-ID: N/A)
CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to improper control of code generation in the startup trust warning mechanism when a user starts Claude Code in a new directory and approves the trust prompt. A remote attacker can place executable files in the folder to execute arbitrary code.
User interaction is required to approve the trust prompt.
Remediation
Install update from vendor's website.