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Advisories

PyTorch Lightning Arbitrary Code Execution via _instantiator Hyperparameter

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severity
high
date
Affecting

  • pytorch-lightning <= 2.6.5

CWE
  • CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
CVSS
8.4
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
George Chen
Description
PyTorch Lightning through 2.6.5, fixed in commit d710d68, contains a remote code execution vulnerability in the _load_state function that imports and executes attacker-controlled module names from checkpoint _instantiator hyperparameters. Attackers can craft malicious checkpoint files that bypass weights_only=True protections to execute arbitrary code when LightningModule.load_from_checkpoint is called.

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