{"id":"CVE-2026-118684","aliases":["EUVD-2026-112389","GHSA-59gw-w64r-2mg7","GHSA-hhh4-h52m-fqh6"],"status":"published","title":"MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads","description":"MONAI before 1.6.1 contains an insufficient integrity verification vulnerability in check_hash() that silently returns True when hash_val is None, with MD5 as the default hash type. Attackers performing man-in-the-middle or registry compromise can substitute bundles, datasets, or model archives downloaded without hashes, enabling malicious file delivery and potential code execution.","severity":{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00185,"percentile":0.08148,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-327"],"published":"2026-10-28T18:59:54Z","modified":"2026-11-04T20:24:19Z","products":[{"vendor":"project-monai","product":"monai"}],"references":[{"url":"https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-hhh4-h52m-fqh6","tags":["vendor-advisory","exploit","advisory"]},{"url":"https://www.vulncheck.com/advisories/monai-before-1.6.1-missing-integrity-verification-via-check-hash-in-downloads","tags":["third-party-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118684","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-59gw-w64r-2mg7"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118684.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-118684","title":"MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads","description":"MONAI before 1.6.1 contains an insufficient integrity verification vulnerability in check_hash() that silently returns True when hash_val is None, with MD5 as the default hash type. Attackers performing man-in-the-middle or registry compromise can substitute bundles, datasets, or model archives downloaded without hashes, enabling malicious file delivery and potential code execution.","status":"published","published":"2026-10-28T18:59:54.186Z","modified":"2026-11-04T20:24:19.576Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-327"],"updated_at":"2026-11-04T21:42:22.271694Z"}],"euvd":[{"id":"EUVD-2026-112389","description":"MONAI before 1.6.1 contains an insufficient integrity verification vulnerability in check_hash() that silently returns True when hash_val is None, with MD5 as the default hash type. Attackers performing man-in-the-middle or registry compromise can substitute bundles, datasets, or model archives downloaded without hashes, enabling malicious file delivery and potential code execution.","status":"published","published":"2026-10-28T18:59:54Z","modified":"2026-11-04T20:24:19Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-04T21:45:43.843698Z"}],"ghsa":[{"id":"GHSA-59gw-w64r-2mg7","title":"MONAI before 1.6.1 contains an insufficient integrity verification vulnerability in check_hash()...","description":"MONAI before 1.6.1 contains an insufficient integrity verification vulnerability in check_hash() that silently returns True when hash_val is None, with MD5 as the default hash type. Attackers performing man-in-the-middle or registry compromise can substitute bundles, datasets, or model archives downloaded without hashes, enabling malicious file delivery and potential code execution.","status":"published","published":"2026-10-28T21:31:16Z","modified":"2026-10-28T21:31:25Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/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","level":"high"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T15:14:36.959763Z"}],"nvd":[{"id":"CVE-2026-118684","description":"MONAI before 1.6.1 contains an insufficient integrity verification vulnerability in check_hash() that silently returns True when hash_val is None, with MD5 as the default hash type. Attackers performing man-in-the-middle or registry compromise can substitute bundles, datasets, or model archives downloaded without hashes, enabling malicious file delivery and potential code execution.","status":"published","published":"2026-10-28T19:17:35.32Z","modified":"2026-11-04T21:17:55.817Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/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","level":"high","assessor":"secondary"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-327"],"updated_at":"2026-11-04T23:43:42.406201Z"}],"osv":[{"id":"CVE-2026-118684","title":"MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads","description":"MONAI before 1.6.1 contains an insufficient integrity verification vulnerability in check_hash() that silently returns True when hash_val is None, with MD5 as the default hash type. Attackers performing man-in-the-middle or registry compromise can substitute bundles, datasets, or model archives downloaded without hashes, enabling malicious file delivery and potential code execution.","status":"published","published":"2026-10-28T18:59:54.186Z","modified":"2026-11-05T21:15:36.805004143Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-327"],"updated_at":"2026-11-05T22:01:21.792402Z"}]}}