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Vulnerabilities

Vulnerability · CVE-2026-2734

In mlflow/mlflow versions up to 3.9.0, the REST API endpoint and the GraphQL query lack proper per-model authorization checks when basic authentication is enabled.

Published May 21, 2026 · catalog updated Jul 23, 2026 · the affected product

Check if you run it

No confirmed exploitation is on record for CVE-2026-2734. EPSS is 0.50%. 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
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.50%
Remediation
Advisory link
Affected products
cpe lfprojects/mlflow

In mlflow/mlflow versions up to 3.9.0, the REST API endpoint and the GraphQL query lack proper per-model authorization checks when basic authentication is enabled. This allows any authenticated user to enumerate all model versions across all registered models, regardless of their permission level. The issue arises due to the absence of in the and for the REST API, and its omission from for GraphQL. This vulnerability can expose sensitive information such as model names, version descriptions, source URIs, tags, and other metadata, potentially revealing proprietary or confidential details in multi-tenant environments. The issue is resolved in version 3.10.0.

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-2026-2734

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-2026-2734. EPSS is 0.50%. 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-284: Improper Access Control. EPSS 0.50%. 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 21, 2026 · NIST NVD

    Detected

    In mlflow/mlflow versions up to 3.9.0, the REST API endpoint and the GraphQL query lack proper per-model authorization checks when basic authentication is enabled. This allows any authenticated user to enumerate all model versions across all registered models, regardless of their permission level. The issue arises due to the absence of in the and for the REST API, and its omission from for GraphQL

  2. Jul 23, 2026 · NIST NVD

    Updated

    In mlflow/mlflow versions up to 3.9.0, the REST API endpoint and the GraphQL query lack proper per-model authorization checks when basic authentication is enabled. This allows any authenticated user to enumerate all model versions across all registered models, regardless of their permission level. The issue arises due to the absence of in the and for the REST API, and its omission from for GraphQL

Sources

  • CVE.orgVulnerability recordCVE-2026-2734

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-2734

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-2026-2734

    In mlflow/mlflow versions up to 3.9.0, the REST API endpoint and the GraphQL query lack proper per-model authorization checks when basic authentication is enabled. This allows any authenticated user to enumerate all model versions

    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.