What is CVE-2026-40031?

CVE-2026-40031 is a high-severity vulnerability in Ufrisk Memprocfs, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-04-08.

How severe is CVE-2026-40031?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Ufrisk Memprocfs

CVE-2026-40031

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, libMS…

EPSS: 0.000 (3.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Ufrisk Memprocfs — versions df80e6e83641f5004025ce661e6dd8139028d7b5, 5.17.0, 5.17

Weakness classification (CWE)

CWE-427 — Uncontrolled Search Path Element

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)

Frequently asked questions

What is CVE-2026-40031?: CVE-2026-40031 is a high-severity vulnerability in Ufrisk Memprocfs, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-04-08.
How severe is CVE-2026-40031?: High severity. CVSS v3 base score is 7.8 out of 10.