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CVE-2026-2734

Authorization Bypass in SearchModelVersions in mlflow/mlflow

Published: May 21, 2026Updated: Jul 23, 2026 Sources: CVE List NVDCWE-284
6.5MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 63.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

In mlflow/mlflow versions up to 3.9.0, the `SearchModelVersions` REST API endpoint and the `mlflowSearchModelVersions` 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 `SearchModelVersions` in the `BEFORE_REQUEST_VALIDATORS` and `AFTER_REQUEST_HANDLERS` for the REST API, and its omission from `GraphQLAuthorizationMiddleware.PROTECTED_FIELDS` 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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-284NVD-CWE-noinfo

Affected Products

mlflow
oss-project
mlflow/mlflowLibraryLibrary
AI / ML / ml-framework
lfprojects
oss-projectaka mlflow, valkey, mcp servers, model context protocol servers
mlflowOn-premLibrary
AI / ML / notebook-mlops

Exploitability

Official Patch Available
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References

https://huntr.com/bounties/d632f783-b2c7-4a3b-af5e-1d693e841c08
huntr.com
https://github.com/mlflow/mlflow/commit/6989066af33fdcb03588fd71a1a67f8fc5ef12c9
github.com

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