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CVE-2026-8147

Authorization Bypass in mlflow/mlflow

Published: Jul 2, 2026Updated: Jul 6, 2026 Sources: CVE List NVDCWE-284
8.1HIGH
NVD MITRE
EPSS Score
0.4%
Top 69.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

In MLflow versions prior to 3.14.0, when running with authentication enabled, the trace API endpoints lack proper authorization validators. This allows any authenticated user to bypass experiment-level authorization controls on all trace operations, including reading, deleting, and modifying traces on experiments they do not have permission to access. The issue arises from the `_before_request` handler, which does not register authorization validators for trace endpoints, resulting in requests proceeding without validation. This vulnerability can expose sensitive data, destroy audit logs, and allow unauthorized modifications.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA: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:HIntegrity
High
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 mcp servers, mlflow, valkey, model context protocol servers
mlflowOn-premLibrary
AI / ML / notebook-mlops

Exploitability

Official Patch Available
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References

https://huntr.com/bounties/b00c3ddd-373e-492f-9bf0-41a28bb21ed5
huntr.com
https://github.com/mlflow/mlflow/commit/f9b1eb510478570609ef451984a255775aa4b937
github.com

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