CVE-2026-43998

Summary

vm2 is an open source vm/sandbox for Node.js. In 3.10.5, NodeVM's require.root path restriction can be bypassed using filesystem symlinks, allowing sandboxed code to load modules from outside the allowed root directory in host context. Because path validation uses path.resolve() (which does not dereference symlinks) but module loading uses Node's native require() (which does), an attacker can load arbitrary host-realm modules and achieve remote code execution. This vulnerability is fixed in 3.11.0.

Affected Software

Weaknesses

• CWE-59: CWE-59: Improper Link Resolution Before File Access ('Link Following')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

Additional References

• https://github.com/patriksimek/vm2/security/advisories/GHSA-cp6g-6699-wx9c

vm2: vm2: Remote code execution due to path restriction bypass via symlinks

Additional References

• https://access.redhat.com/security/cve/CVE-2026-43998
• https://bugzilla.redhat.com/show_bug.cgi?id=2477206
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43998.json

References

• https://github.com/patriksimek/vm2/security/advisories/GHSA-cp6g-6699-wx9c

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