Dashboard / CVE-2026-2652

CVE-2026-2652

HIGH
MEDIUM Priority: 1.79 BB Relevance: 81/100
Published: 2026-05-15 Modified: 2026-11-11 First seen: 2026-11-11 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: Low
I: High
A: Low

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
lfprojects mlflow < 3.10.0

References & Advisories (2)

https://huntr.com/bounties/5aeff5f0-49c7-4180-b5cb-c9a046f16756
Exploit Mitigation Third Party Advisory

Bug Bounty Relevance

81 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.6 / 10.0 v3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

EPSS — Exploitation Probability

20.78%
Raw Score 0.207830
Percentile 97.6%
Date 2026-11-14

EPSS Trend

2026-11-14
0.20783
2026-11-13
0.20783
2026-11-12
0.20783
2026-11-10
0.20783

Intelligence Sources

nvd ref →

External Links