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TI-2026-02264 Aliases CVE-2026-2652GHSA-75cm-x2w3-8mgf

Authentication Bypass in mlflow/mlflow

Priority HIGH 76CWE-305Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · High · Low
Fix status
Fixed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA and GitHub.

Summary

A vulnerability in mlflow/mlflow versions 3.9.0 and earlier allows unauthenticated access to certain FastAPI routes when the server is started with authentication enabled (`--app-name basic-auth`) and served via uvicorn (ASGI). The FastAPI permission middleware only enforces authentication on `/gateway/` routes, leaving other routes such as the Job API (`/ajax-api/3.0/jobs/*`) and the OpenTelemetry trace ingestion API (`/v1/traces`) unprotected. This allows unauthenticated remote attackers to submit jobs, read job results, cancel running jobs, and inject arbitrary trace data into experiments. The issue arises from an architectural mismatch between Flask and FastAPI authentication mechanisms, where the `_find_fastapi_validator()` function fails to handle non-`/gateway/` paths, resulting in a complete authentication bypass. This vulnerability is fixed in version 3.10.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.20783 97th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed mlflow/mlflow (mlflow): 3.10.0mlflow (PyPI): 3.11.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MLflowmlflow/mlflowbefore 3.10.03.10.0Patch availableCNA
—mlflow (PyPI)before 3.11.03.11.0Patch availableGHSA-75cm-x2w3-8mgf
  • mlflow/mlflow VendorMLflow Affected before 3.10.0 Fixed in 3.10.0 Patch available CNA
  • mlflow (PyPI) Vendor— Affected before 3.11.0 Fixed in 3.11.0 Patch available GHSA-75cm-x2w3-8mgf

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*before 3.10.0VulnerableMLflow
  • cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:* Versions before 3.10.0 Vulnerable ·MLflow

Remediation

  • Fix · CNA mlflow/mlflow (mlflow) Fixed in 3.10.0
  • Fix · GHSA-75cm-x2w3-8mgf mlflow (PyPI) Fixed in 3.11.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-2652
  2. 2026-10-03 Alias added: GHSA-75cm-x2w3-8mgf
  3. 2026-10-25 EPSS moved to the 95th–99th percentile

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2026-46366 Server-side request forgery in mlflow KEVCVSS 3.1CRITICAL 9.3
  • TI-2023-03518 Absolute Path Traversal in mlflow/mlflow CVSS 3.1CRITICAL 10.0
  • TI-2023-01113 Path Traversal: '\..\filename' in mlflow/mlflow CVSS 3.1CRITICAL 9.8
  • TI-2025-14028 Command Injection in mlflow/mlflow CVSS 3.1CRITICAL 10.0
  • TI-2023-05540 MLflow Authentication Bypass CVSS 3.1CRITICAL 9.8
  • TI-2023-02603 Path Traversal: '\..\filename' in mlflow/mlflow CVSS 3.1CRITICAL 9.8
See all 76 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences