CVE-2026-3490

Picklescan before version 1.0.3 contains a scanning bypass vulnerability in the scan_pytorch function. By using dynamic eval and the __reduce__ trick, attackers can embed malicious magic numbers in PyTorch payloads that evade picklescan detection.

Picklescan before 0.0.35 contains an unsafe pickle deserialization vulnerability allowing unauthenticated attackers to read arbitrary server files by chaining io.FileIO and urllib.request.urlopen.

Picklescan before 1.0.4 fails to block at least seven Python standard library modules, allowing for remote code execution. Attackers can craft malicious pickle files importing these unblocked modules, bypassing picklescan's safety validation.

Picklescan before 1.0.1 contains an unsafe deserialization vulnerability allowing unauthenticated users to execute arbitrary code by hiding eval calls nested under callable objects via getattr. Attackers can embed malicious code in pickle files that evades detection but executes when the pickle is loaded from untrusted sources.

Picklescan before 1.0.4 contains an incomplete blocklist for the profile module, allowing attackers to achieve arbitrary code execution via exec(). Attackers can craft malicious pickle files calling profile.run(statement) to execute arbitrary Python code.

Picklescan before version 0.0.27 contains a parsing logic error in the _list_globals function when handling STACK_GLOBAL opcodes. This error allows malicious pickle files to bypass detection, potentially leading to unexpected exceptions.

Picklescan versions before 0.0.33 fail to block the ctypes module, allowing attackers to achieve remote code execution by invoking direct syscalls and accessing raw memory. Attackers can craft malicious pickle files using ctypes.WinDLL to load kernel32.dll and execute arbitrary commands.

Picklescan before 0.0.33 contains an arbitrary file writing vulnerability that allows attackers to bypass the dangerous blocklist. Attackers can construct malicious pickle objects to overwrite critical system files.

Picklescan before 0.0.33 contains an incomplete deny-list that fails to block pydoc.locate and operator.methodcaller functions, allowing attackers to bypass security checks. Remote attackers can craft malicious pickle files using these unblocked functions to achieve arbitrary code execution when the pickle is deserialized.

An improper handling of exceptional conditions in the ZIP archive scanning component of mmaitre314 picklescan allows a remote attacker to bypass security scans. By crafting a ZIP archive with a file having a bad CRC, the scanner halts and fails to analyze contents for malicious pickle files.