{"id":"CVE-2026-118684","state":"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.","publishedAt":"2026-10-28T18:59:54.186Z","updatedAt":"2026-10-28T18:59:54.186Z","severity":{"score":8.2,"label":"High","version":"4.0","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","source":"VulnCheck"},"assigner":"VulnCheck","products":["Project-MONAI MONAI"],"affected":[{"vendor":"Project-MONAI","product":"MONAI","packageURL":"pkg:pypi/monai","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.6.1","versionType":"semver"},{"version":"1.6.1","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-hhh4-h52m-fqh6","https://www.vulncheck.com/advisories/monai-before-1.6.1-missing-integrity-verification-via-check-hash-in-downloads"],"weaknesses":["CWE-327"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/118xxx/CVE-2026-118684.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-118684","state":"PUBLISHED","datePublished":"2026-10-28T18:59:54.186Z","dateUpdated":"2026-10-28T18:59:54.186Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-28T17:28:46.442Z"},"containers":{"cna":{"title":"MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Project-MONAI","product":"MONAI","packageURL":"pkg:pypi/monai","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.6.1","versionType":"semver"},{"version":"1.6.1","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-hhh4-h52m-fqh6","tags":["vendor-advisory"],"name":"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","name":"VulnCheck Advisory: MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-327","lang":"en","description":"Use of a Broken or Risky Cryptographic Algorithm","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-28T18:59:54.186Z"},"datePublic":"2026-10-13T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:project-monai:monai:*:*:*:*:*:*:*:*","versionEndExcluding":"1.6.1"}]}]}],"x_generator":{"engine":"vulncheck-endgame"}}}}}