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

Quick assessment

Affected

Project-MONAI MONAI

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MONAI 在 1.6.1 版本之前存在一个完整性验证不足的漏洞，位于函数中：当为时，该函数会静默返回，且默认使用 MD5 作为哈希类型。攻击者若实施中间人攻击或入侵软件仓库，便可替换未附带哈希值的捆绑包、数据集或模型归档文件，从而投递恶意文件并可能导致代码执行。

CVSS 5.9 · Medium Updated Oct 29, 2026

Possible ATT&CK Techniques 2 AI

T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

Vendor	Product	Version Range	Status
Project-MONAI	MONAI	`< 1.6.1`	affected
		`1.6.1`	unaffected

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

MONAI before 1.6.1 Missing Integrity Verification via check_hash in Downloads

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

使用已被攻破或存在风险的密码学算法

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Project-MONAI	MONAI	0 ~ 1.6.1	-

II. Public POCs for CVE-2026-118684

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-118684

请登录查看更多情报信息。

Other References for CVE-2026-118684 (2)

https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-hhh4-h52m-fqh6 vendor-advisory
https://www.vulncheck.com/advisories/monai-before-1.6.1-missing-integrity-verification-via-check-hash-in-downloads third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-118684

IV. Related Vulnerabilities

Same product: MONAI

Same vendor: Project-MONAI

Same weakness: CWE-327