CVE-2026-4035: A vulnerability in mlflow/mlflow versions prior to 3.11.0 allows for the resolution of environment variables i

Q: How do I fix CVE-2026-4035?

mlflow: upgrade to 3.11.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-4035 being exploited?

CVE-2026-4035 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-2026-4035 affect?

CVE-2026-4035 affects mlflow. Severity is high (CVSS 7.7). A vulnerability in mlflow/mlflow versions prior to 3.11.0 allows for the resolution of environment variables in AI Gateway secrets, which can be exploited to exfiltrate sensitive server-side environment credentials to an attacker-controlled

Q: How urgent is CVE-2026-4035?

Priority 43/100. High severity; Public exploit reference

This month

HIGH 7.7UPGRADE

CVE-2026-4035 is a high-severity flaw (CVSS 7.7) affecting mlflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in mlflow/mlflow versions prior to 3.11.0 allows for the resolution of environment variables in AI Gateway secrets, which can be exploited to exfiltrate sensitive server-side environment credentials to an attacker-controlled endpoint. This issue arises because the `api_key` field in gateway secrets can accept `$ENV_VAR` references, which are resolved against the MLflow server's environment during runtime. The resolved secrets are

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-201
Published	2026-06-03
Last modified	2026-08-14

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

Last updated 2026-08-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-03 09:16 UTCPublished CVE record published
2026-08-14 13:19 UTCUpdated Record last modified

lfprojects mlflow UPGRADE

Affected: < 3.11.0

Fixed in: 3.11.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.11.0 (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-2026-4035?

mlflow: upgrade to 3.11.0. Exact commands for each OS are on this page.

Is CVE-2026-4035 being exploited?

CVE-2026-4035 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-2026-4035 affect?

CVE-2026-4035 affects mlflow. Severity is high (CVSS 7.7). A vulnerability in mlflow/mlflow versions prior to 3.11.0 allows for the resolution of environment variables in AI Gateway secrets, which can be exploited to exfiltrate sensitive server-side environment credentials to an attacker-controlled

How urgent is CVE-2026-4035?

Priority 43/100. High severity; Public exploit reference

Related CVEs

CVE-2026-64849 CRITICAL 9.3 EXPLOITED UPGRADE MLflow Server-Side Request Forgery Vulnerability
CVE-2026-8147 HIGH 8.1 UPGRADE In MLflow versions prior to 3.14.0, when running with authentication enabled, the trace API endpoints lack pro
CVE-2026-2734 MEDIUM 6.5 UPGRADE In mlflow/mlflow versions up to 3.9.0, the `SearchModelVersions` REST API endpoint and the `mlflowSearchModelV
CVE-2026-10803 LOW 3.6 UPGRADE A flaw has been found in MLflow up to 3.10.0
CVE-2026-2651 CRITICAL 9.0 UPGRADE A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoint

References

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