CVE-2026-58659
PyTorch Lightning Arbitrary Code Execution via _instantiator Hyperparameter
HIGH 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.
- Affected
- Lightning-AI · pytorch-lightning
- CVSS v4.0 VULNCHECK
- 8.4 HIGH
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v4.0 GitHub
- 8.4 HIGH
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 - CVSS v3.1 VULNCHECK
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS
- 0.63% chance of exploitation in the next 30 days, 49th percentile
- Published
- 2026-07-15
- Updated
- 2026-10-08
Proof-of-concept exploits (1)
- Lightning-AI/pytorch-lightning/issues/2182231416★ · 2026-10-12
Security advisories
- https://www.vulncheck.com/advisories/pytorch-lightning-arbitrary-code-execution-via-insta…
- advisories/GHSA-qqmf-gpg7-g8gw