5.9
MediumCVSS 3.1 · from VulnCheck
CVE-2026-118684
MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads
MONAI · Broken cryptography · CWE-327AffectedMONAI
FixUpdate to 1.6.1 or newer
PublishedOct 28, 18:59 · VulnCheck
ScoredOct 28 · 5.9 · VulnCheck
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:10 UTC
What we know
No known exploitation. CISA KEV, checked 22:10 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.
It only works under certain conditions, which makes it harder to pull off. CVSS: high attack complexity.
A successful attack can change data. CVSS impact.
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.
From VulnCheck
Affected and fixed versions
ProductAffectedFixed inMONAIbefore 1.6.11.6.1MONAINot affected1.6.1
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known