{"affected":[{"defaultStatus":"unknown","ecosystem":"github","packageName":"mlflow/mlflow","product":"mlflow","source":"CNA: VulnCheck","vendor":"mlflow","versions":[{"lessThan":"3.18.0","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-53995","cwes":["CWE-22"],"description":"MLflow before 3.18.0 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.","epss":{"date":"2026-11-13","percentile":0.50525,"score":0.00625},"exploits":[{"kind":"exploit","source":"CNA: VulnCheck","url":"https://github.com/SaiTeja-Erukude/CVE-2026-53995-mlflow-path-traversal"}],"kev":null,"metrics":[{"score":8.8,"severity":"high","source":"CNA: VulnCheck","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","version":"4.0"},{"score":8.2,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","version":"3.1"},{"score":8.8,"severity":"high","source":"NVD: disclosure@vulncheck.com","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":8.2,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","version":"3.1"}],"modifiedAt":1794590928098,"publishedAt":1792443916530,"references":[{"source":"CNA: VulnCheck","tags":["technical-description","exploit"],"url":"https://github.com/SaiTeja-Erukude/CVE-2026-53995-mlflow-path-traversal"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/mlflow/mlflow/releases/tag/v3.18.0"},{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/mlflow/mlflow/pull/26842"},{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/mlflow/mlflow/commit/d64cc8b673f71d29d93a7845fc179946ad56a881"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/mlflow-path-traversal-via-trace-id-api"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/SaiTeja-Erukude/CVE-2026-53995-mlflow-path-traversal"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/mlflow/mlflow/commit/d64cc8b673f71d29d93a7845fc179946ad56a881"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/mlflow/mlflow/pull/26842"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/mlflow-path-traversal-via-trace-id-api"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/mlflow/mlflow/pull/26842"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/mlflow/mlflow/commit/d64cc8b673f71d29d93a7845fc179946ad56a881"}],"revision":"862093377127c398f0e2e7a66254d6a95c534bd169ce2d4ece24d2f5125b046c","sources":[{"modifiedAt":1794590928098,"name":"CNA: VulnCheck","retrievedAt":1794593432089,"url":"https://www.cve.org/CVERecord?id=CVE-2026-53995"},{"modifiedAt":1793639864490,"name":"NVD","retrievedAt":1793643391998,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53995"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794593455422,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-53995"}],"ssvc":{"assessedAt":1792445801493,"automatable":"yes","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"MLflow < 3.18.0 Path Traversal via Trace ID API","updatedAt":1794593455422}