CVE-2026-2651
A vulnerability in MLflow versions <=3.10.1.dev0 allows unauthorized access to multipart upload (MPU) endpoints when the `--serve-artifacts` mode is enabled.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
- EPSS
- 0.34% probability · 28th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-862, CWE-1220
- Affected
- lfprojects/mlflow
- Source
- security@huntr.dev
References
- https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966fPatch
- https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dcExploit, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2026-2651
- https://bugzilla.redhat.com/show_bug.cgi?id=2481117
- https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dcExploit, Third Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2651.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.