by Kastro
Paper/Archive/CVE-2026-92951

CVE-2026-92951

patriksimek vm2 — vm2 before 3.11.7 Module Allowlist Bypass via Custom Resolver

EPSS 0.5%CVSS 9.9
critical.is priorityof 100
38
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 40.5.405 × 208.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

vm2 before 3.11.7 contains an incorrect authorization vulnerability in the external package allowlist check that uses non-exact substring matching instead of full package-name boundary validation. Attackers can bypass the allowlist by requiring a colliding package name that contains an allowlisted package substring, causing vm2 to load and execute unauthorized host packages in the host context.

Affected

ProductAffectedFixed inSource
vm2< 3.11.73.11.7CNA

Scores by source

VulnCheck (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorygithub.com/patriksimek/vm2/security/advisories/GHSA-c48m-32m9-vx93writeupvulncheck.com/advisories/vm2-before-3.11.7-module-allowlist-bypass-via-custom-resolver