CVE-2026-4035

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Source
https://cve.org/CVERecord?id=CVE-2026-4035
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4035.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-4035
Aliases
Downstream
Published
2026-06-03T07:18:08Z
Modified
2026-08-16T03:31:16Z
Severity
  • 7.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
Summary
Environment Variable Resolution Vulnerability in mlflow/mlflow
Details

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.

Database specific 
{
    "cna_assigner": "@huntr_ai",
    "cwe_ids": [
        "CWE-201"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4035.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "3.11.0"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/mlflow/mlflow

Affected ranges

Type
GIT
Repo
https://github.com/mlflow/mlflow
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
4a3f2f720cb4f058c9e0c5b883e0acc9ab64a7f3
Database specific
Show details 
{
    "source": "REFERENCES"
}

Affected versions

1.*
1.0.0
Other
nightly
v0.*
v0.2.0
v0.2.1
v0.3.0
v0.4.0
v0.4.1
v0.4.2
v0.5.0
v0.6.0
v0.7
v0.8.0
v0.8.1
v1.*
v1.7.0
v2.*
v2.2.0
v3.*
v3.0.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4035.json"