CVE-2026-40031 MemProcFS < 5.17 DLL/Shared Library Hijacking
Attackers can achieve arbitrary code execution by placing malicious libraries in the working directory or manipulating environment variables.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-40031?
CVE-2026-40031 is a high-severity vulnerability in ufrisk MemProcFS, published on 8 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-427
Which versions are affected by CVE-2026-40031?
It affects 1 product.
Products include Ufrisk Memprocfs.
How do I fix CVE-2026-40031?
No fix has been published for CVE-2026-40031 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-40031 being exploited?
There is no known exploitation of CVE-2026-40031 in the wild and no public exploit code.
Sources
Also known as GHSA-wxrw-fvc7-2xmx.