{"id":"CVE-2026-118684","title":"MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads","summary":"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 comp…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","cvssSource":"cna","cwe":["CWE-327"],"vendor":"Project-MONAI","product":"MONAI","affected":["MONAI < 1.6.1"],"published":"2026-10-28","updated":"2026-10-28","sourceUpdated":"2026-10-28T18:59:54.186Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118684","references":[{"url":"https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-hhh4-h52m-fqh6","label":"GitHub Security Advisory (GHSA-hhh4-h52m-fqh6)"},{"url":"https://www.vulncheck.com/advisories/monai-before-1.6.1-missing-integrity-verification-via-check-hash-in-downloads","label":"VulnCheck Advisory: MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads"}],"tags":["cve.org"],"epss":0.00185,"epssPercentile":0.08051,"ingestedAt":"2026-10-29T15:37:07.550Z","slug":"CVE-2026-118684","body":"## Overview\n\nMONAI 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.\n\n## Affected\n\n- `MONAI < 1.6.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}