Vulnerability · Published Apr 8, 2026 · Assigned by VulnCheck

CVE-2026-40031MemProcFS < 5.17 DLL/Shared Library Hijacking

High 7.8

In plain English

A high-severity uncontrolled search path in MemProcFS from ufrisk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)0.1%top 96.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

MemProcFS before 5.17 contains multiple unsafe library-loading patterns that enable DLL and shared-library hijacking across six attack surfaces, including bare-name LoadLibraryU and dlopen calls without path qualification for vmmpyc, libMSCompression, and plugin DLLs. An attacker who places a malicious DLL or shared library in the working directory or manipulates LD_LIBRARY_PATH can achieve arbitrary code execution when MemProcFS loads.

Affected products (as reported)

Vendor	Product	Versions
ufrisk	MemProcFS	0 – through 5.16.12

Weakness: CWE-427 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Release Notes product
Patch Commit patch
Mobasi Sentinel Vulnerability Index vendor-advisory
VulnCheck Advisory: MemProcFS < 5.17 DLL/Shared Library Hijacking third-party-advisory