{"id":"CVE-2026-2651","summary":"Missing Authorization Validation in mlflow/mlflow","details":"A vulnerability in MLflow versions \u003c=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.","aliases":["BIT-mlflow-2026-2651","GHSA-8c7q-86fq-vvmh","PYSEC-2026-2220"],"modified":"2026-07-15T01:48:55.219957123Z","published":"2026-05-25T06:00:34.002Z","database_specific":{"cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2651.json","cna_assigner":"@huntr_ai"},"references":[{"type":"WEB","url":"https://huntr.com/bounties/65beb119-d3e0-4e03-af2f-fa98f78f83dc"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2651.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-2651"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/2xxx/CVE-2026-2651.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2651"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2481117"},{"type":"FIX","url":"https://github.com/mlflow/mlflow/commit/d7290811d8f3c95366d80109424edc1fb1ad966f"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mlflow/mlflow","events":[{"introduced":"0"},{"fixed":"d7290811d8f3c95366d80109424edc1fb1ad966f"}],"database_specific":{"cpe":"cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"3.10.1"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["nightly","v3.0.0","v2.2.0","v1.7.0","1.0.0","v0.8.1","v0.8.0","v0.7","v0.6.0","v0.5.0","v0.4.2","v0.4.1","v0.4.0","v0.3.0","v0.2.1","v0.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-2651.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"}]}