CVE-2026-63643Public exploitNetwork attack vector

Internal data disclosure via calendar SSRF

Published Aug 18, 2026 · Updated Aug 19, 2026

Server-side request forgery in MagicMirror² before 2.37.0 allows remote attackers to read internal service data via /calendar. The ADD_CALENDAR handler in defaultmodules/calendar/node_helper.js accepts an attacker-controlled URL, auth block, and selfSignedCert flag from the unauthenticated Socket.IO namespace and passes them to CalendarFetcher without destination validation. Exposure requires network reachability to the mirror's HTTP port; valid iCal responses are returned as parsed CALENDAR_EVENTS data, while other targets still yield a blind request and timing oracle.

CVSS severity6.3
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in MagicMirror² before 2.37.0 allows remote attackers to read internal service data via /calendar. The ADD_CALENDAR handler in defaultmodules/calendar/node_helper.js accepts an attacker-controlled URL, auth block, and selfSignedCert flag from the unauthenticated Socket.IO namespace and passes them to CalendarFetcher without destination validation. Exposure requires network reachability to the mirror's HTTP port; valid iCal responses are returned as parsed CALENDAR_EVENTS data, while other targets still yield a blind request and timing oracle.

The record

CVE
CVE-2026-63643
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
MagicMirror
Product
MagicMirror²
Classifications
CWE-441, CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.37.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MagicMirror · MagicMirror²version=< 2.37.0

Published CVSS scores

6.3OSVCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-441Unintended Proxy or Intermediary ('Confused Deputy')
CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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