CVE-2026-63640
MagicMirror socket payload secret placeholder expansion can disclose SECRET_* environment variables
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | magicmirror | < 2.37.0 | 2.37.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-q4gh-4ffp-5cg8
- https://github.com/MagicMirrorOrg/MagicMirror/security/advisories/GHSA-q4gh-4ffp-5cg8
- https://github.com/MagicMirrorOrg/MagicMirror/pull/4184
- https://github.com/MagicMirrorOrg/MagicMirror/commit/ca7b752025962441196e148f8c1bc04b90117979
- https://github.com/MagicMirrorOrg/MagicMirror/releases/tag/v2.37.0