Vulnerability · Published Oct 28, 2026 · Assigned by VulnCheck

CVE-2026-118684MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads

Medium 5.9

In plain English

A medium-severity broken cryptography in MONAI from Project-MONAI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.2%top 91.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Project-MONAI	MONAI	0 – before 1.6.1

Weakness: CWE-327 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References

GitHub Security Advisory (GHSA-hhh4-h52m-fqh6) vendor-advisory
VulnCheck Advisory: MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads third-party-advisory