What is CVE-2023-6976?

CVE-2023-6976 is a high-severity vulnerability in Lfprojects Mlflow, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2023-12-20.

How severe is CVE-2023-6976?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Lfprojects Mlflow

CVE-2023-6976

This vulnerability is capable of writing arbitrary files into arbitrary locations on the remote filesystem in the context of the server process.

Vulnerability class: Unrestricted File Upload

Published 2023-12-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000

Affected products

Lfprojects Mlflow
Mlflow Mlflow/mlflow — versions unspecified

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

huntr.com/bounties/2408a52b-f05b-4cac-9765-4f74bac3f20f (Exploit, Third Party Advisory)
github.com/mlflow/mlflow/commit/5044878da0c1851ccfdd5c0a867157ed9a502fbc (Patch)

Frequently asked questions

What is CVE-2023-6976?: CVE-2023-6976 is a high-severity vulnerability in Lfprojects Mlflow, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2023-12-20.
How severe is CVE-2023-6976?: High severity. CVSS v3 base score is 8.8 out of 10.