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CVE PROGRAM SOURCE RECORD8.4 High

CVE-2026-58659

PyTorch Lightning Arbitrary Code Execution via _instantiator Hyperparameter

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Lightning-AI pytorch-lightning

Default version status: unaffected

  • 0 to ≤ 2.6.5affected
  • d710d689510d50e800f53b3cd773cbca20b1f86funaffected
pkg:pypi/lightning

References