What’s Vulnerable › Vulnerabilities

CVE-2026-63640: MagicMirror socket payload secret placeholder expansion can disclose SECRET_* environment variables

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-18 · updated 2026-10-22
• Weakness: CWE-200

Description

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 products

• MagicMirrorOrg MagicMirror: before 2.37.0

References

• 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

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