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How the CVE Works:
The vulnerability arises from improper path validation in Claude Code versions prior to 1.0.24. Instead of using canonical path comparison, the system relies on prefix matching, allowing attackers to bypass directory restrictions. By creating or leveraging a directory with the same prefix as the current working directory (CWD), an attacker can inject malicious content into the Claude Code context window, leading to unauthorized file access outside the intended directory.
DailyCVE Form:
Platform: Claude Code
Version: <1.0.24
Vulnerability: Directory Traversal
Severity: Medium
Date: 2023-XX-XX
Prediction: Patch expected by 2023-XX-XX
What Undercode Say:
Example exploit command python3 exploit.py --target /vuln/dir --prefix /malicious/dir Detection command grep -r "prefix_match" /usr/lib/claude-code/ Mitigation check claude-code --version | grep "1.0.24"
How Exploit:
- Create a directory matching CWD prefix.
- Inject malicious payload via context window.
- Bypass path restrictions.
Protection from this CVE:
- Update to v1.0.24+.
- Disable untrusted context inputs.
- Enforce canonical path checks.
Impact:
- Unauthorized file access.
- Potential data leakage.
- Limited to prefix collisions.
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Sources:
Reported By: github.com
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