Description
A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled. The authorization logic does not enforce resource-level permission checks for `/mlflow-artifacts/mpu/*` endpoints, enabling attackers to overwrite artifacts belonging to other users. This can lead to unauthorized cross-user writes, model supply chain poisoning, and arbitrary code execution when compromised models are loaded. The issue is resolved in version 3.10.0.
Affected products
lfprojects: mlflow
References6
- github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1… Patch
- huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc ExploitThird Party Advisory
- huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc ExploitThird Party Advisory
- access.redhat.com/security/cve/CVE-2026-2651
- bugzilla.redhat.com/show_bug.cgi?id=2481117
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2651.…
Metrics
- CVSS 3.1
-
9.0
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 28 · as of 14 November 2026
- CWE
- CWE-862CWE-1220
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.