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The vulnerability stemmed from direct password comparison using 'app.auth[username] == password' in the login route. This insecure comparison leaks timing information because Python's string comparison short-circuits on first mismatch. The commit patched this by replacing it with hmac.compare_digest in a new compare_passwords_securely function. The routes.py modification in the diff clearly shows the vulnerable comparison was in the login handler.
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| gradio | pip | < 4.19.2 | 4.19.2 |
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