CVE-2026-58659

PyTorch Lightning Arbitrary Code Execution via _instantiator Hyperparameter

Published Jul 15, 2026 CVSS 4.0 · 8.4 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-qqmf-gpg7-g8gw PyTorch Lightning allows arbitrary code execution through checkpoint _instantiator hyperparameters
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title PyTorch Lightning Arbitrary Code Execution via _instantiator Hyperparameter
First Time appeared Lightningai
Lightningai pytorch Lightning
Weaknesses CWE-470
CPEs cpe:2.3:a:lightningai:pytorch_lightning:*:*:*:*:*:python:*:*
Vendors & Products Lightningai
Lightningai pytorch Lightning
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.4, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 8, 2026, 2:07 PM
Reserved
Jul 1, 2026, 9:54 PM
Status
Analyzed
Published
Jul 15, 2026, 6:16 PM
Modified
Oct 24, 2026, 9:10 PM
Severity
Important
Public date
Jul 15, 2026, 5:02 PM