MagicMirror socket payload secret placeholder expansion can disclose SECRET_* environment variables

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63640
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-18 18:19:11 UTC
Updated2026-08-18 18:19:11 UTC
DescriptionMagicMirror² 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem Types: CWE-200 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA MagicMirrorOrg MagicMirror affected < 2.37.0 Not specified

References

ReferenceSourceLinkTags
github.com/MagicMirrorOrg/MagicMirror/pull/4184 [email protected] github.com
github.com/MagicMirrorOrg/MagicMirror/commit/ca7b752025962441196e148f8c1... [email protected] github.com
github.com/MagicMirrorOrg/MagicMirror/releases/tag/v2.37.0 [email protected] github.com
github.com/MagicMirrorOrg/MagicMirror/security/advisories/GHSA-q4gh-4ffp... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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