Description
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 then sent in provider authentication headers to the configured upstream `api_base`. This vulnerability can be exploited by low-privileged authenticated users in basic-auth deployments or by unauthenticated users in default deployments without `basic-auth`. The impact includes potential leakage of sensitive credentials such as cloud artifact credentials (`AWS_ACCESS_KEY_ID`, `AWS_SECRET_ACCESS_KEY`), which could lead to artifact poisoning and cross-boundary code execution in downstream environments. The issue is fixed in version 3.11.0.
Published: 2026-06-03
Score: 7.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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History

Fri, 05 Jun 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Thu, 04 Jun 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Lfprojects
Lfprojects mlflow
CPEs cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*
Vendors & Products Lfprojects
Lfprojects mlflow
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'}


Wed, 03 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 03 Jun 2026 12:45:00 +0000

Type Values Removed Values Added
First Time appeared Mlflow
Mlflow mlflow/mlflow
Vendors & Products Mlflow
Mlflow mlflow/mlflow

Wed, 03 Jun 2026 11:15:00 +0000

Type Values Removed Values Added
Description 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 then sent in provider authentication headers to the configured upstream `api_base`. This vulnerability can be exploited by low-privileged authenticated users in basic-auth deployments or by unauthenticated users in default deployments without `basic-auth`. The impact includes potential leakage of sensitive credentials such as cloud artifact credentials (`AWS_ACCESS_KEY_ID`, `AWS_SECRET_ACCESS_KEY`), which could lead to artifact poisoning and cross-boundary code execution in downstream environments. The issue is fixed in version 3.11.0.
Title Environment Variable Resolution Vulnerability in mlflow/mlflow
Weaknesses CWE-201
References
Metrics cvssV3_0

{'score': 9.1, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L'}


Subscriptions

Lfprojects Mlflow
Mlflow Mlflow/mlflow
cve-icon MITRE

Status: PUBLISHED

Assigner: @huntr_ai

Published:

Updated: 2026-06-30T12:09:23.099Z

Reserved: 2026-03-12T02:17:42.523Z

Link: CVE-2026-4035

cve-icon Vulnrichment

Updated: 2026-06-30T03:17:29.078Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-03T09:16:13.083

Modified: 2026-06-04T19:35:39.613

Link: CVE-2026-4035

cve-icon Redhat

Severity : Important

Publid Date: 2026-06-03T07:18:08Z

Links: CVE-2026-4035 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-04T21:00:15Z

Weaknesses