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vuln-cve/data/2026/4xxx/CVE-2026-4137.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-4137",
"assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
"state": "PUBLISHED",
"assignerShortName": "@huntr_ai",
"dateReserved": "2026-03-13T15:15:45.839Z",
"datePublished": "2026-05-18T20:26:23.104Z",
"dateUpdated": "2026-05-19T12:47:53.221Z"
},
"containers": {
"cna": {
"title": "Incomplete Fix for CVE-2025-10279: Insecure Temporary Directory Permissions in mlflow/mlflow",
"providerMetadata": {
"orgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
"shortName": "@huntr_ai",
"dateUpdated": "2026-05-18T20:26:23.104Z"
},
"descriptions": [
{
"lang": "en",
"value": "In mlflow/mlflow versions prior to 3.11.0, the `get_or_create_nfs_tmp_dir()` function in `mlflow/utils/file_utils.py` creates temporary directories with world-writable permissions (0o777), and the `_create_model_downloading_tmp_dir()` function in `mlflow/pyfunc/__init__.py` creates directories with group-writable permissions (0o770). These insecure permissions allow local attackers to tamper with model artifacts, such as cloudpickle-serialized Python objects, and achieve arbitrary code execution when the tampered artifacts are deserialized via `cloudpickle.load()`. This vulnerability is particularly critical in environments with shared NFS mounts, such as Databricks, where NFS is enabled by default. The issue is a continuation of the vulnerability class addressed in CVE-2025-10279, which was only partially fixed."
}
],
"affected": [
{
"vendor": "mlflow",
"product": "mlflow/mlflow",
"versions": [
{
"version": "unspecified",
"lessThan": "3.11.0",
"status": "affected",
"versionType": "custom"
}
]
}
],
"references": [
{
"url": "https://huntr.com/bounties/648dc30b-76c7-4433-86b8-f43d926fd8d6"
},
{
"url": "https://github.com/mlflow/mlflow/commit/1dcbb0c2fbd1f446c328830e601ca13a28219b8a"
}
],
"metrics": [
{
"cvssV3_0": {
"version": "3.0",
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7,
"baseSeverity": "HIGH"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"type": "CWE",
"lang": "en",
"description": "CWE-378 Creation of Temporary File With Insecure Permissions",
"cweId": "CWE-378"
}
]
}
],
"source": {
"advisory": "648dc30b-76c7-4433-86b8-f43d926fd8d6",
"discovery": "EXTERNAL"
}
},
"adp": [
{
"references": [
{
"url": "https://huntr.com/bounties/648dc30b-76c7-4433-86b8-f43d926fd8d6",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-05-19T12:47:50.311629Z",
"id": "CVE-2026-4137",
"options": [
{
"Exploitation": "poc"
},
{
"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": "2026-05-19T12:47:53.221Z"
}
}
]
}
}