{"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"}}]}}