[Security] Fix CodeQL alert #35: Deserialization of user-controlled data#87
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colin-d-fried wants to merge 1 commit into
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[Security] Fix CodeQL alert #35: Deserialization of user-controlled data#87colin-d-fried wants to merge 1 commit into
colin-d-fried wants to merge 1 commit into
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| session = pickle.loads(session_data.encode()) | ||
| import json as _json | ||
| session = _json.loads(session_data) |
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Unnecessary inline import with unconventional alias
Low Severity
The json module is imported inside the function body and aliased as _json, even though there is no naming conflict with json in this file. The underscore-prefixed alias is unconventional and misleading (suggesting a private symbol). The import belongs at the top of the file alongside the other standard library imports (pickle, yaml, marshal).
This was referenced Mar 26, 2026
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Summary
Fixes CodeQL alert #35: Deserialization of user-controlled data
vulnerable_deserialization.pyFix Applied
See the diff for the specific secure coding change applied.
Fixes #37
Note
Medium Risk
Reduces RCE risk by replacing
pickle.loadson user-provided session data with JSON parsing, but may change accepted session formats and error behavior for the/sessionendpoint.Overview
Mitigates CodeQL CWE-502 by changing the
/sessionrestore path invulnerable_deserialization.pyto parse user-providedsessiondata withjson.loadsinstead ofpickle.loads.This removes insecure deserialization from that endpoint, trading it for a JSON-only session payload expectation.
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