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Vulnerabilities

Vulnerability · CVE-2026-4137

In mlflow/mlflow versions prior to 3.11.0, the function in creates temporary directories with world-writable permissions (0o777), and the function in creates directori…

Published May 18, 2026 · catalog updated Jul 24, 2026 · the affected product

Check if you run it

No confirmed exploitation is on record for CVE-2026-4137. EPSS is 0.16%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.16%
Remediation
Advisory link
Affected products
cpe lfprojects/mlflow

In mlflow/mlflow versions prior to 3.11.0, the function in creates temporary directories with world-writable permissions (0o777), and the function in 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 . 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe lfprojects/mlflowversion unspecified

How to fix CVE-2026-4137

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-4137. EPSS is 0.16%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-378. EPSS 0.16%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 18, 2026 · NIST NVD

    Detected

    In mlflow/mlflow versions prior to 3.11.0, the function in creates temporary directories with world-writable permissions (0o777), and the function in 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 artifa

  2. Jul 24, 2026 · NIST NVD

    Updated

    In mlflow/mlflow versions prior to 3.11.0, the function in creates temporary directories with world-writable permissions (0o777), and the function in 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 artifa

Sources

  • CVE.orgVulnerability recordCVE-2026-4137

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-4137

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-4137

    In mlflow/mlflow versions prior to 3.11.0, the function in creates temporary directories with world-writable permissions (0o777), and the function in creat

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.