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10.0

vm2 can let sandbox code steal HTTPS credentials

CVE-2026-92940 · published 23 days ago
Summary

Versions of vm2 that allow the https module to be required let code running in a sandbox see the real HTTPS agent used by the host application. When the host finishes a request, the sandbox can capture the request details, read authorization headers and even see the response data in plain text, enabling it to reuse those credentials. Upgrade vm2 to version 3.11.7 or later to stop this behavior.

What to do
  • Update vm2 to version 3.11.7.
  • Update patriksimek vm2 to version 3.11.7 or later.
Affected software
Ecosystem VendorProductAffected versions
– patriksimek vm2 < 3.11.7
npm – vm2 >= 3.11.3, <= 3.11.6
Fix: upgrade to 3.11.7
Original advisory text
vm2 exposes host HTTPS credentials and TLS traffic through globalAgent
vm2 versions 3.11.3 through 3.11.6 expose the host process's real https.globalAgent to sandboxed code when a NodeVM is explicitly configured to allow require('https'). The builtin loader wraps host modules in a read-only proxy, but method calls such as Agent.prototype.on() are forwarded to the underlying host object, so sandbox code can register a listener for the agent's 'free' event. When an unrelated host HTTPS request releases a pooled connection, the listener receives the live host request options and the host TLSSocket, allowing sandboxed code to read the host's Authorization header and private destination host/port, attach a data listener to the released socket and read subsequent host response bodies in plaintext, and issue attacker-chosen authenticated requests using the stolen credentials. The issue is fixed in 3.11.7.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically
  • Gives an attacker partial control
Severity
10.0 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-668Exposure of Resource to Wrong Sphere
Timeline
Published17 Sep 2026
Updated9 Oct 2026
First seen17 Sep 2026
Sources
CVE-2026-92940 · NVD
CVE-2026-92940 · MITRE
CVE-2026-92940 · OSV
GHSA-h85j-hv3c-qfgq · GHSA
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