MagicMirror² is an open source modular smart mirror platform. Prior to 2.37.0, the ADD_CALENDAR handler in defaultmodules/calendar/node_helper.js accepts an attacker-controlled URL, authentication data, and selfSignedCert setting through the unauthenticated Socket.IO namespace /calendar. The handler passes these fields to CalendarFetcher, causing a server-side request without SSRF validation and optionally disabling TLS verification. When the response is valid iCal, CALENDAR_EVENTS returns parsed event data to the attacker, allowing internal-service response data to be exfiltrated; other responses still provide a blind request and timing primitive. This issue is fixed in version 2.37.0.
CVE-2026-63643
MEDIUMPre-NVD 6.36.3—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 61% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.3
- EG Score
- 6.3(medium)
- EG Risk
- 29(Track)EG Risk 29/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity63% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 39%
- KEV
- Not listed
Published
August 18, 2026
Last Modified
August 19, 2026
Advisory Details (4)
Auto-updated Aug 18, 2026🔬 Proof of concept available. Patch available. Sources: github_release, github, github_pr, github_commit.
github_release Patch Available
v2.37.0
Patch available: MagicMirrorOrg/MagicMirror v2.37.0
https://github.com/MagicMirrorOrg/MagicMirror/releases/tag/v2.37.0github_commit
commit 58c2a5e675a7 (MagicMirrorOrg/MagicMirror)
Fix landed in MagicMirrorOrg/MagicMirror commit 58c2a5e675a7 — awaiting tagged release
https://github.com/MagicMirrorOrg/MagicMirror/commit/58c2a5e675a7d367b64d72e1d35680d202ff5c9fgithub_pr
fix(server): enforce ipWhitelist for Socket.IO too
Fix merged in MagicMirrorOrg/MagicMirror PR #4169 on 2026-06-01 — awaiting tagged release
https://github.com/MagicMirrorOrg/MagicMirror/pull/4169github Patch Available🟡 PoC Available
ssrf calendar .js · Advisory · MagicMirrorOrg/MagicMirror · GitHub
https://github.com/MagicMirrorOrg/MagicMirror/security/advisories/GHSA-w6x9-28jw-hq7jVendor Advisories for CVE-2026-63643(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| magicmirror | — | 2.37.0 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-08-20 22:55 UTCEPSS rescore
- 2026-08-19 19:21 UTCEG score recompute
- 2026-08-19 18:38 UTCEG score recompute
- 2026-08-19 17:04 UTCEPSS rescore
- 2026-08-18 18:23 UTCEG score recompute
- 2026-08-18 17:26 UTCEG score recompute
- 2026-08-18 17:26 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-918
- CVE-2016-10927EG 10.0CRITICAL
- CVE-2016-10926EG 10.0CRITICAL
- CVE-2018-1000124EG 10.0CRITICAL
- CVE-2017-11291EG 10.0EPSS p92CRITICAL
- CVE-2017-12905EG 10.0CRITICAL
- CVE-2017-8794EG 10.0CRITICAL
- CVE-2017-13667EG 9.9CRITICAL
- CVE-2017-17674EG 9.8CRITICAL
- CVE-2013-4864EG 9.8EPSS p93CRITICAL
- CVE-2018-0403EG 9.8CRITICAL
Frequently asked(5)
What is CVE-2026-63643?
CVE-2026-63643 is a medium vulnerability published on August 18, 2026. MagicMirror² is an open source modular smart mirror platform. Prior to 2.37.0, the ADDCALENDAR handler in defaultmodules/calendar/nodehelper.js accepts an attacker-controlled URL, authentication data, and selfSignedCert setting through the unauthenticated Socket.IO namespace /calendar. The handler…
When was CVE-2026-63643 disclosed?
CVE-2026-63643 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63643 actively exploited?
CVE-2026-63643 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 60.8% of all scored CVEs.
What is the CVSS score of CVE-2026-63643?
CVE-2026-63643 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-63643?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63643, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-63643
Is Your Infrastructure Affected by CVE-2026-63643?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.