CVE-2026-31221
Modified Modified - Updated After Analysis
BaseFortify

Publication date: 2026-05-12

Last updated on: 2026-05-15

Assigner: MITRE

Description
PyTorch-Lightning versions 2.6.0 and earlier contain an insecure deserialization vulnerability (CWE-502) in the checkpoint loading mechanism. The LightningModule.load_from_checkpoint() method, which is commonly used to load saved model states, internally calls torch.load() without setting the security-restrictive weights_only=True parameter. This default behavior allows the deserialization of arbitrary Python objects via the Pickle module. A remote attacker can exploit this by providing a maliciously crafted checkpoint file, leading to arbitrary code execution on the victim's system when the file is loaded.
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Meta Information
Published
2026-05-12
Last Modified
2026-05-15
Generated
2026-06-10
EPSS Evaluated
2026-06-08
NVD
CVE-2026-31221
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
lightningai pytorch_lightning to 2.6.0 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
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