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vuln-cve/data/2026/31xxx/CVE-2026-31221.json
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{
"dataType": "CVE_RECORD",
"cveMetadata": {
"state": "PUBLISHED",
"cveId": "CVE-2026-31221",
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"dateUpdated": "2026-05-15T18:05:39.679Z",
"dateReserved": "2026-03-09T00:00:00.000Z",
"datePublished": "2026-05-12T00:00:00.000Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre",
"dateUpdated": "2026-05-12T15:09:17.157Z"
},
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"affected": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"version": "n/a",
"status": "affected"
}
]
}
],
"references": [
{
"url": "https://github.com/Lightning-AI/pytorch-lightning"
},
{
"url": "https://www.notion.so/CVE-2026-31221-35d1e1393188815f8db7c4fd08076639"
}
],
"problemTypes": [
{
"descriptions": [
{
"type": "text",
"lang": "en",
"description": "n/a"
}
]
}
]
},
"adp": [
{
"problemTypes": [
{
"descriptions": [
{
"type": "CWE",
"cweId": "CWE-502",
"lang": "en",
"description": "CWE-502 Deserialization of Untrusted Data"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.8,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
}
},
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-05-15T18:02:25.761345Z",
"id": "CVE-2026-31221",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-05-15T18:05:39.679Z"
}
}
]
},
"dataVersion": "5.2"
}