PT-2026-43005 · Mlflow · Mlflow

Published 2026-02-18 · Updated 2026-06-27 · CVE-2026-2651

Positive Technologies (AI Summary)

CVSS v3.1

9.0

Critical

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions MLflow versions prior to 3.10.0

Description Unauthorized access to multipart upload (MPU) endpoints is possible when the --serve-artifacts mode is enabled. The authorization logic fails to enforce resource-level permission checks for endpoints matching '/mlflow-artifacts/mpu/*', allowing attackers to overwrite artifacts belonging to other users. This flaw can result in unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded.

Recommendations Update to version 3.10.0. As a temporary workaround, disable the --serve-artifacts mode to prevent unauthorized access to the affected endpoints.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-1220

CWE-862

Related Identifiers

BDU:2026-07859

BIT-MLFLOW-2026-2651

CVE-2026-2651

GHSA-8C7Q-86FQ-VVMH

PYSEC-2026-2220

Affected Products

Mlflow

References · 17

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2651.json · Exploit
• 🔥 https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc · Exploit
• https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f · Patch
• https://osv.dev/vulnerability/PYSEC-2026-2220 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07859 · Security Note
• https://osv.dev/vulnerability/CVE-2026-2651 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-8c7q-86fq-vvmh · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-2651 · Security Note
• https://osv.dev/vulnerability/BIT-mlflow-2026-2651 · Vendor Advisory
• https://github.com/mlflow/mlflow · Note
• https://t.me/CVEtracker/54829 · Telegram Post
• https://access.redhat.com/security/cve/CVE-2026-2651 · Note
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2651.json · Note
• https://twitter.com/CVEnew/status/2058935279868682546 · Twitter Post
• https://t.me/cveNotify/177910 · Telegram Post