{"id":"CVE-2026-53995","state":"PUBLISHED","title":"MLflow 3.17.1 and prior Path Traversal via Trace ID API","description":"MLflow 3.17.1 and earlier contains a path traversal vulnerability in the FileStore tracking backend that allows unauthenticated attackers to control filesystem paths by submitting a crafted trace ID containing traversal sequences to the POST /api/3.0/mlflow/traces endpoint. Attackers can exploit FileStore.start_trace() to write trace_info.yaml, request_metadata, and tag files with attacker-controlled metadata outside the intended experiment trace directory, subject to the server process's filesystem permissions. FileStore is the default tracking backend before MLflow 3.7.0 and opt-in thereafter (the default changed to a SQLite database), so deployments in the earlier part of the affected range are vulnerable without special configuration while later ones are affected only when FileStore is explicitly selected.","publishedAt":"2026-10-19T21:05:16.530Z","updatedAt":"2026-10-27T10:14:10.190Z","severity":{"score":8.8,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["mlflow mlflow"],"affected":[{"vendor":"mlflow","product":"mlflow","packageURL":"pkg:github/mlflow/mlflow","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.17.1","versionType":"semver"}],"repo":"https://github.com/mlflow/mlflow"}],"references":["https://github.com/SaiTeja-Erukude/CVE-2026-53995-mlflow-path-traversal","https://github.com/mlflow/mlflow/pull/26842","https://www.vulncheck.com/advisories/mlflow-path-traversal-via-trace-id-api"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53995.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53995","state":"PUBLISHED","datePublished":"2026-10-19T21:05:16.530Z","dateUpdated":"2026-10-27T10:14:10.190Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-06-11T16:07:13.001Z"},"containers":{"cna":{"title":"MLflow 3.17.1 and prior Path Traversal via Trace ID API","descriptions":[{"lang":"en","value":"MLflow 3.17.1 and earlier contains a path traversal vulnerability in the FileStore tracking backend that allows unauthenticated attackers to control filesystem paths by submitting a crafted trace ID containing traversal sequences to the POST /api/3.0/mlflow/traces endpoint. 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