Vulnerability Details CVE-2026-4137
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 0.3%
CVSS Severity
CVSS v3 Score 7.0
References
Products affected by CVE-2026-4137
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cpe:2.3:a:lfprojects:mlflow:-
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cpe:2.3:a:lfprojects:mlflow:0.2.0
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cpe:2.3:a:lfprojects:mlflow:0.2.1
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cpe:2.3:a:lfprojects:mlflow:0.3.0
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cpe:2.3:a:lfprojects:mlflow:0.4.0
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cpe:2.3:a:lfprojects:mlflow:0.4.1
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cpe:2.3:a:lfprojects:mlflow:0.4.2
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cpe:2.3:a:lfprojects:mlflow:0.5.0
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cpe:2.3:a:lfprojects:mlflow:0.5.1
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cpe:2.3:a:lfprojects:mlflow:0.5.2
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cpe:2.3:a:lfprojects:mlflow:0.6.0
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cpe:2.3:a:lfprojects:mlflow:0.7
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cpe:2.3:a:lfprojects:mlflow:0.7.0
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cpe:2.3:a:lfprojects:mlflow:0.8.0
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cpe:2.3:a:lfprojects:mlflow:0.8.1
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cpe:2.3:a:lfprojects:mlflow:0.8.2
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cpe:2.3:a:lfprojects:mlflow:0.9.0
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cpe:2.3:a:lfprojects:mlflow:0.9.1
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cpe:2.3:a:lfprojects:mlflow:1.0.0
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cpe:2.3:a:lfprojects:mlflow:1.1.0
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cpe:2.3:a:lfprojects:mlflow:1.10.0
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cpe:2.3:a:lfprojects:mlflow:1.11.0
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cpe:2.3:a:lfprojects:mlflow:1.12.0
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cpe:2.3:a:lfprojects:mlflow:1.12.1
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cpe:2.3:a:lfprojects:mlflow:1.13.0
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cpe:2.3:a:lfprojects:mlflow:1.13.1
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cpe:2.3:a:lfprojects:mlflow:1.14.0
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cpe:2.3:a:lfprojects:mlflow:1.14.1
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cpe:2.3:a:lfprojects:mlflow:1.15.0
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cpe:2.3:a:lfprojects:mlflow:1.16.0
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cpe:2.3:a:lfprojects:mlflow:1.17.0
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cpe:2.3:a:lfprojects:mlflow:1.18.0
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cpe:2.3:a:lfprojects:mlflow:1.19.0
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cpe:2.3:a:lfprojects:mlflow:1.2.0
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cpe:2.3:a:lfprojects:mlflow:1.20.0
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cpe:2.3:a:lfprojects:mlflow:1.20.1
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cpe:2.3:a:lfprojects:mlflow:1.20.2
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cpe:2.3:a:lfprojects:mlflow:1.21.0
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cpe:2.3:a:lfprojects:mlflow:1.22.0
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cpe:2.3:a:lfprojects:mlflow:1.23.0
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cpe:2.3:a:lfprojects:mlflow:1.23.1
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cpe:2.3:a:lfprojects:mlflow:1.24.0
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cpe:2.3:a:lfprojects:mlflow:1.25.0
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cpe:2.3:a:lfprojects:mlflow:1.25.1
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cpe:2.3:a:lfprojects:mlflow:1.26.0
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cpe:2.3:a:lfprojects:mlflow:1.26.1
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cpe:2.3:a:lfprojects:mlflow:1.27.0
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cpe:2.3:a:lfprojects:mlflow:1.28.0
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cpe:2.3:a:lfprojects:mlflow:1.29.0
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cpe:2.3:a:lfprojects:mlflow:1.3.0
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cpe:2.3:a:lfprojects:mlflow:1.30.0
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cpe:2.3:a:lfprojects:mlflow:1.4.0
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cpe:2.3:a:lfprojects:mlflow:1.5.0
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cpe:2.3:a:lfprojects:mlflow:1.6.0
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cpe:2.3:a:lfprojects:mlflow:1.7.0
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cpe:2.3:a:lfprojects:mlflow:1.7.1
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cpe:2.3:a:lfprojects:mlflow:1.7.2
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cpe:2.3:a:lfprojects:mlflow:1.8.0
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cpe:2.3:a:lfprojects:mlflow:1.9.0
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cpe:2.3:a:lfprojects:mlflow:1.9.1
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cpe:2.3:a:lfprojects:mlflow:2.0.0
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cpe:2.3:a:lfprojects:mlflow:2.0.1
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cpe:2.3:a:lfprojects:mlflow:2.1.0
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cpe:2.3:a:lfprojects:mlflow:2.1.1
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cpe:2.3:a:lfprojects:mlflow:2.10.0
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cpe:2.3:a:lfprojects:mlflow:2.10.1
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cpe:2.3:a:lfprojects:mlflow:2.10.2
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cpe:2.3:a:lfprojects:mlflow:2.11.0
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cpe:2.3:a:lfprojects:mlflow:2.11.1
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cpe:2.3:a:lfprojects:mlflow:2.11.2
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cpe:2.3:a:lfprojects:mlflow:2.11.3
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cpe:2.3:a:lfprojects:mlflow:2.12.1
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cpe:2.3:a:lfprojects:mlflow:2.12.2
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cpe:2.3:a:lfprojects:mlflow:2.13.0
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cpe:2.3:a:lfprojects:mlflow:2.13.1
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cpe:2.3:a:lfprojects:mlflow:2.13.2
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cpe:2.3:a:lfprojects:mlflow:2.14.0
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cpe:2.3:a:lfprojects:mlflow:2.14.1
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cpe:2.3:a:lfprojects:mlflow:2.14.2
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cpe:2.3:a:lfprojects:mlflow:2.14.3
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cpe:2.3:a:lfprojects:mlflow:2.15.0
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cpe:2.3:a:lfprojects:mlflow:2.15.1
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cpe:2.3:a:lfprojects:mlflow:2.16.0
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cpe:2.3:a:lfprojects:mlflow:2.16.1
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cpe:2.3:a:lfprojects:mlflow:2.16.2
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cpe:2.3:a:lfprojects:mlflow:2.17.0
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cpe:2.3:a:lfprojects:mlflow:2.17.1
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cpe:2.3:a:lfprojects:mlflow:2.17.2
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cpe:2.3:a:lfprojects:mlflow:2.18.0
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cpe:2.3:a:lfprojects:mlflow:2.19.0
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cpe:2.3:a:lfprojects:mlflow:2.2.0
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cpe:2.3:a:lfprojects:mlflow:2.2.1
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cpe:2.3:a:lfprojects:mlflow:2.2.2
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cpe:2.3:a:lfprojects:mlflow:2.20.0
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cpe:2.3:a:lfprojects:mlflow:2.20.1
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cpe:2.3:a:lfprojects:mlflow:2.20.2
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cpe:2.3:a:lfprojects:mlflow:2.20.3
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cpe:2.3:a:lfprojects:mlflow:2.20.4
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cpe:2.3:a:lfprojects:mlflow:2.21.0
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cpe:2.3:a:lfprojects:mlflow:2.21.1
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cpe:2.3:a:lfprojects:mlflow:2.21.2
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cpe:2.3:a:lfprojects:mlflow:2.21.3
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cpe:2.3:a:lfprojects:mlflow:2.22.0
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cpe:2.3:a:lfprojects:mlflow:2.22.1
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cpe:2.3:a:lfprojects:mlflow:2.22.2
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cpe:2.3:a:lfprojects:mlflow:2.3.0
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cpe:2.3:a:lfprojects:mlflow:2.3.1
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cpe:2.3:a:lfprojects:mlflow:2.3.2
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cpe:2.3:a:lfprojects:mlflow:2.4.0
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cpe:2.3:a:lfprojects:mlflow:2.4.1
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cpe:2.3:a:lfprojects:mlflow:2.4.2
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cpe:2.3:a:lfprojects:mlflow:2.5.0
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cpe:2.3:a:lfprojects:mlflow:2.6.0
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cpe:2.3:a:lfprojects:mlflow:2.7.0
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cpe:2.3:a:lfprojects:mlflow:2.7.1
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cpe:2.3:a:lfprojects:mlflow:2.8.0
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cpe:2.3:a:lfprojects:mlflow:2.8.1
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cpe:2.3:a:lfprojects:mlflow:2.9.0
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cpe:2.3:a:lfprojects:mlflow:2.9.1
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cpe:2.3:a:lfprojects:mlflow:2.9.2
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cpe:2.3:a:lfprojects:mlflow:3.0.0
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cpe:2.3:a:lfprojects:mlflow:3.0.1
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cpe:2.3:a:lfprojects:mlflow:3.1.0
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cpe:2.3:a:lfprojects:mlflow:3.1.1
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cpe:2.3:a:lfprojects:mlflow:3.1.2
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cpe:2.3:a:lfprojects:mlflow:3.1.3
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cpe:2.3:a:lfprojects:mlflow:3.1.4
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cpe:2.3:a:lfprojects:mlflow:3.10.0
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cpe:2.3:a:lfprojects:mlflow:3.10.1
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cpe:2.3:a:lfprojects:mlflow:3.2.0
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cpe:2.3:a:lfprojects:mlflow:3.3.0
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cpe:2.3:a:lfprojects:mlflow:3.3.1
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cpe:2.3:a:lfprojects:mlflow:3.3.2
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cpe:2.3:a:lfprojects:mlflow:3.4.0
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cpe:2.3:a:lfprojects:mlflow:3.5.0
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cpe:2.3:a:lfprojects:mlflow:3.5.1
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cpe:2.3:a:lfprojects:mlflow:3.6.0
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cpe:2.3:a:lfprojects:mlflow:3.7.0
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cpe:2.3:a:lfprojects:mlflow:3.8.0
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cpe:2.3:a:lfprojects:mlflow:3.8.1
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cpe:2.3:a:lfprojects:mlflow:3.9.0