GitHub Advisoryadvisory · PyPI
GHSA-qqmf-gpg7-g8gw PyTorch Lightning allows arbitrary code execution through checkpoint _instantiator hyperparameters
HIGH
Official page ↗
- Aliases
- CVE-2026-58659
- Ecosystem
- PyPI
- Packages
- lightning
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-470
- Reviewed
- 2026-09-03
Affected packages
• PyPI lightning: < 2.6.6 → fixed in 2.6.6
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.
Related
Alias · CVE (1)
- CVE-2026-58659 PyTorch Lightning through 2.6.5, fixed in commit d710d68, contains a remote code execution vulnerability in the _load_state function that… vulnerability
Weakness · CWE (1)
- CWE-470 Use of Externally-Controlled Input to Select Classes or Code weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-58659 advisory
- https://github.com/Lightning-AI/pytorch-lightning/issues/21822 web
- https://github.com/Lightning-AI/pytorch-lightning/pull/21832 web
- https://github.com/Lightning-AI/pytorch-lightning/commit/d710d689510d50e800f53b3cd773cbca20b1f86f web
- https://github.com/Lightning-AI/pytorch-lightning package
- https://github.com/Lightning-AI/pytorch-lightning/releases/tag/2.6.6 web
- https://github.com/advisories/GHSA-qqmf-gpg7-g8gw advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/lightning/PYSEC-2026-3624.yaml web
- https://github.com/pypa/advisory-database/tree/main/vulns/pytorch-lightning/PYSEC-2026-3967.yaml web
- https://www.vulncheck.com/advisories/pytorch-lightning-arbitrary-code-execution-via-instantiator-hyperparameter web