CVE-2026-42281Public exploitNetwork attack vector

Unauthenticated SSRF via unvalidated /cors URL fetch

Published May 14, 2026 · Updated May 14, 2026

SSRF in MagicMirror² before 2.36.0 allows remote attackers to read internal resources and server secrets through the /cors endpoint. The cors() handler in js/server_functions.js passes an unauthenticated user-supplied URL to fetch() without destination validation, returns the response, and expands environment-variable placeholders before sending the request. Any host that can reach the MagicMirror HTTP port can proxy requests into localhost, private networks, or cloud metadata services and receive the resulting data.

CVSS severity9.2
Critical
EPSS probability1.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in MagicMirror² before 2.36.0 allows remote attackers to read internal resources and server secrets through the /cors endpoint. The cors() handler in js/server_functions.js passes an unauthenticated user-supplied URL to fetch() without destination validation, returns the response, and expands environment-variable placeholders before sending the request. Any host that can reach the MagicMirror HTTP port can proxy requests into localhost, private networks, or cloud metadata services and receive the resulting data.

The record

CVE
CVE-2026-42281
Published
May 14, 2026
Updated
May 14, 2026
Vendor
MagicMirror
Product
MagicMirror²
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2026CVE publishedPublication date reported by the CVE source.
  2. May 14, 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=< 2.36.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MagicMirror · MagicMirror²version=< 2.36.0

Published CVSS scores

8.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
9.2GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/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-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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