{
"id": "GHSA-qqmf-gpg7-g8gw",
"aliases": [
"CVE-2026-58659"
],
"details": "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.",
"summary": " PyTorch Lightning allows arbitrary code execution through checkpoint _instantiator hyperparameters",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2022.6.15"
}
]
}
],
"package": {
"name": "lightning",
"ecosystem": "PyPI"
}
}
],
"modified": "2026-09-03T19:51:19Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V4",
"score": "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"
}
],
"published": "2026-07-15T18:31:58Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58659",
"type": "ADVISORY"
},
{
"url": "https://github.com/Lightning-AI/pytorch-lightning/issues/21822",
"type": "WEB"
},
{
"url": "https://github.com/Lightning-AI/pytorch-lightning/pull/21832",
"type": "WEB"
},
{
"url": "https://github.com/Lightning-AI/pytorch-lightning/commit/d710d689510d50e800f53b3cd773cbca20b1f86f",
"type": "WEB"
},
{
"url": "https://github.com/Lightning-AI/pytorch-lightning",
"type": "PACKAGE"
},
{
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/lightning/PYSEC-2026-3624.yaml",
"type": "WEB"
},
{
"url": "https://www.vulncheck.com/advisories/pytorch-lightning-arbitrary-code-execution-via-instantiator-hyperparameter",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-470"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2026-07-15T18:16:48Z",
"github_reviewed_at": "2026-09-03T19:51:19Z"
}
}