Missing Authorization in MLflow - CVE-2026-69146
Published: November 9, 2026
Vulnerability identifier: #VU162798
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-69146
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a low-privileged authenticated attacker to corrupt dataset lineage metadata in other users' MLflow runs without update permission.
The vulnerability exists due to missing per-run update authorization on the LogInputs endpoint when MLflow uses the built-in basic-auth plugin. A low-privileged authenticated attacker can send a POST request to /api/2.0/mlflow/runs/log-inputs targeting another user's run and persist arbitrary dataset records in that run's lineage metadata.
Affected software
MLflow
How to mitigate CVE-2026-69146
Install security update from vendor's website.
MLflow - update to 3.16.0