CVE-2026-58659highCWE-470

CVE-2026-58659: high-severity vulnerability in Lightning-AI pytorch-lightning

PyTorch Lightning Arbitrary Code Execution via _instantiator Hyperparameter

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.4epss 0.6%
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.
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
Affected products
Lightning-AI · pytorch-lightning
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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