CVE-2026-44004

Summary

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, sandboxed code can call Buffer.alloc() with an arbitrary size to allocate memory directly on the host heap. Because Buffer.alloc is a synchronous C++ native call, vm2's timeout option cannot interrupt it. A single request can exhaust host memory and crash the process with a FATAL ERROR: Reached heap limit. This vulnerability is fixed in 3.11.0.

Affected Software

Weaknesses

• CWE-770: CWE-770: Allocation of Resources Without Limits or Throttling

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

Additional References

• https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7

vm2: vm2: Denial of Service via host memory exhaustion

Additional References

• https://access.redhat.com/security/cve/CVE-2026-44004
• https://bugzilla.redhat.com/show_bug.cgi?id=2477195
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44004.json

References

• https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7

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