CVE-2026-2651: A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoint

Q: How do I fix CVE-2026-2651?

mlflow: upgrade to newer than 3.10.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-2651 being exploited?

CVE-2026-2651 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-2651 affect?

CVE-2026-2651 affects mlflow. Severity is critical (CVSS 9.0). A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/ml

Q: How urgent is CVE-2026-2651?

Priority 43/100. Critical severity; Public exploit reference

This month

CRITICAL 9.0UPGRADE

CVE-2026-2651 is a critical-severity flaw (CVSS 9.0) affecting mlflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution w

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-862, CWE-1220
Published	2026-05-25
Last modified	2026-07-21

Publisher (CNA): huntr.dev · Vendor: lfprojects

Last updated 2026-07-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-25 07:16 UTCPublished CVE record published
2026-07-21 19:10 UTCUpdated Record last modified

lfprojects mlflow UPGRADE

Affected: <= 3.10.1

Fixed in: newer than 3.10.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mlflow || rpm -q mlflow || mlflow --version

2. UPGRADE to newer than 3.10.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mlflow

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mlflow

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-2651?

mlflow: upgrade to newer than 3.10.1. Exact commands for each OS are on this page.

Is CVE-2026-2651 being exploited?

CVE-2026-2651 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-2651 affect?

CVE-2026-2651 affects mlflow. Severity is critical (CVSS 9.0). A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/ml

How urgent is CVE-2026-2651?

Priority 43/100. Critical severity; Public exploit reference

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References

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