Code Injection in Claude Code - #VU128528
Published: April 30, 2026
Vulnerability identifier: #VU128528
CSH Severity: High
CVSS v4.0: 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
CVE-ID: N/A
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Anthropic
Affected software:
Claude Code
Claude Code
Detailed vulnerability description
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 security update from vendor's website.