Bug 2519785

Summary: CVE-2026-63640 magicmirror: MagicMirror²: Information disclosure via incorrect secret placeholder expansion [fedora-all]
Product: [Fedora] Fedora Reporter: Laura Pardo <lpardo>
Component: magicmirrorAssignee: Davide Cavalca <davide>
Status: NEW --- QA Contact:
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Priority: medium    
Version: rawhideCC: davide
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["16da0aeb-c953-4341-acbe-ea744ba4a545"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 2518092    

Description Laura Pardo 2026-08-19 17:30:40 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.