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🛡️ Sentinel: [CRITICAL/HIGH] Fix command injection in _open_resource_file #96

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🛡️ Sentinel: [CRITICAL/HIGH] Fix command injection in _open_resource_file #96

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4 changes: 4 additions & 0 deletions .jules/sentinel.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
## 2026-06-01 - Prevent Command Injection on Windows File Open
**Vulnerability:** Command injection vulnerability due to using `subprocess.call(['start', filename], shell=True)` on Windows in `UtilityManager._open_resource_file`.
**Learning:** Using `shell=True` with unvalidated input (like filenames) exposes the application to command injection.
**Prevention:** Use `os.startfile(filename)` instead to open files on Windows, which directly opens the file without invoking the command shell, avoiding the risk entirely.
2 changes: 1 addition & 1 deletion libs/utility_manager.py
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Expand Up @@ -43,7 +43,7 @@ def _open_resource_file(self, filename):
try:
if os.path.isfile(filename):
if platform.system() == "Windows":
subprocess.call(['start', filename], shell=True)
os.startfile(filename)
elif platform.system() == "Darwin":
subprocess.call(['open', filename])
elif platform.system() == "Linux":
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