TI-2026-26226 Aliases CVE-2026-33865 GHSA-fh64-r2vc-xvhr

Stored XSS via unsafe YAML parsing in MLflow

MEDIUM 56CWE-79Published 2026-04-07 · Updated 2026-04-14

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: None · Low · None
Fix status: Partial Red Hat: 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-79.

Summary

MLflow is vulnerable to Stored Cross-Site Scripting (XSS) caused by unsafe parsing of YAML-based MLmodel artifacts in its web interface. An authenticated attacker can upload a malicious MLmodel file containing a payload that executes when another user views the artifact in the UI. This allows actions such as session hijacking or performing operations on behalf of the victim. This issue affects MLflow version through 3.10.1

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00227 13th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA and NVD

Fix Partial mlflow (PyPI): 3.11.1Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
MLflow	Mlflow	up to 3.10.1	—	No fix listed	CNA
—	mlflow (PyPI)	before 3.11.1	3.11.1	Patch available	GHSA-fh64-r2vc-xvhr

Mlflow VendorMLflow Affected up to 3.10.1 Fixed in — No fix listed CNA
mlflow (PyPI) Vendor— Affected before 3.11.1 Fixed in 3.11.1 Patch available GHSA-fh64-r2vc-xvhr

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:lfprojects:mlflow::::::::	up to 3.10.1	Vulnerable	MLflow

cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:* Versions up to 3.10.1 Vulnerable ·MLflow

Remediation

Fix · GHSA-fh64-r2vc-xvhr mlflow (PyPI) Fixed in 3.11.1 Advisory →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat OpenShift AI (RHOAI)	Affected	No fix yet: Fix deferred

Not affected: 1 product

Red Hat OpenShift AI (RHOAI)

Timeline

2026-10-02 Threatist record created from CVE-2026-33865
2026-10-03 Alias added: GHSA-fh64-r2vc-xvhr

References

Exploit 1

https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors

Patch 1

https://github.com/mlflow/mlflow/pull/21435

Advisory 2

Other 4

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