CVE-2026-79657: Custom Pickle Unpickler Find Class Dotted Name Traversal
Custom `pickle.Unpickler.find_class` delegates to `super().find_class` without validating against dotted names (`.` in `name`). Under pickle protocol 4+, `find_class` resolves dotted names via `getattr` chaining, allowing an attacker to bypass module-level allowlists to access dangerous attributes or submodules.
Pythongreprules fetch cve-2026-79657-custom-pickle-unpickler-find-class-dotted-name-traversal --engine opengrepDescription
Custom `pickle.Unpickler.find_class` delegates to `super().find_class` without validating against dotted names (`.` in `name`). Under pickle protocol 4+, `find_class` resolves dotted names via `getattr` chaining, allowing an attacker to bypass module-level allowlists to access dangerous attributes or submodules.
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