CVE-2026-63640

MagicMirror² is an open source modular smart mirror platform. Prior to 2.37.0, when hideConfigSecrets is enabled, the catch-all socket dispatcher in js/node_helper.js passes every inbound object payload through replaceSecretPlaceholder in js/server_functions.js before invoking socketNotificationReceived. A client connected to a loaded module namespace can submit a SECRET_API_KEY placeholder, causing the server to replace it with the corresponding process environment value. The default weather helper accepts INIT_WEATHER, copies the attacker-controlled instanceId, and returns it in WEATHER_ERROR, providing an echo path for the expanded secret. This reverses the intended one-way redaction boundary and can disclose API tokens, credentials, or service keys stored in SECRET_ variables. This issue is fixed in version 2.37.0.

• CWE-200

• https://github.com/MagicMirrorOrg/MagicMirror/commit/ca7b752025962441196e148f8c1bc04b90117979
• https://github.com/MagicMirrorOrg/MagicMirror/pull/4184
• https://github.com/MagicMirrorOrg/MagicMirror/releases/tag/v2.37.0
• https://github.com/MagicMirrorOrg/MagicMirror/security/advisories/GHSA-q4gh-4ffp-5cg8
• https://github.com/MagicMirrorOrg/MagicMirror/security/advisories/GHSA-q4gh-4ffp-5cg8

Published

Aug 18, 2026

Last Modified

Sep 8, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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