CVE-2026-2652

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Source

https://cve.org/CVERecord?id=CVE-2026-2652

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2652.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-2652

Aliases

Published

2026-05-15T02:13:19Z

Modified

2026-08-12T03:51:45Z

Severity

8.6 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L CVSS Calculator

Summary

Authentication Bypass in mlflow/mlflow

Details

A vulnerability in mlflow/mlflow versions 3.9.0 and earlier allows unauthenticated access to certain FastAPI routes when the server is started with authentication enabled (--app-name basic-auth) and served via uvicorn (ASGI). The FastAPI permission middleware only enforces authentication on /gateway/ routes, leaving other routes such as the Job API (/ajax-api/3.0/jobs/*) and the OpenTelemetry trace ingestion API (/v1/traces) unprotected. This allows unauthenticated remote attackers to submit jobs, read job results, cancel running jobs, and inject arbitrary trace data into experiments. The issue arises from an architectural mismatch between Flask and FastAPI authentication mechanisms, where the _find_fastapi_validator() function fails to handle non-/gateway/ paths, resulting in a complete authentication bypass. This vulnerability is fixed in version 3.10.0.

Database specific

{
    "cna_assigner": "@huntr_ai",
    "cwe_ids": [
        "CWE-305"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2652.json"
}

References

Affected packages

Git / github.com/mlflow/mlflow

Affected ranges

Type

GIT

Repo

https://github.com/mlflow/mlflow

Events

Introduced

Fixed

d0b97413e383796f1ca742b20cac74543185816c

Fixed

bb62e773263c14e9ba4d1a82fe72d0de2442c6aa

Database specific

Show details

{
    "cpe": "cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.10.0"
        }
    ],
    "source": [
        "CPE_RANGE",
        "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

v3.10.0rc0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2652.json"