Dark Reader is an accessibility browser extension that makes web pages colors dark. Prior to 4.9.126, a website can cause the browser extension's image inversion pipeline to request an unauthenticated icon-like bitmap from a locally running web server when the resource uses a known public-like HTTPS URL and is detected as requiring inversion. This behavior can cross the website-to-local-network boundary and disclose limited information associated with the requested resource. The darkreader npm package used for website integration is not affected. This issue is fixed in version 4.9.126 for Firefox and version 4.9.128 for other browsers.
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Fixes

Solution

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Workaround

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History

Tue, 22 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Description Dark Reader is an accessibility browser extension that makes web pages colors dark. Prior to 4.9.126, a website can cause the browser extension's image inversion pipeline to request an unauthenticated icon-like bitmap from a locally running web server when the resource uses a known public-like HTTPS URL and is detected as requiring inversion. This behavior can cross the website-to-local-network boundary and disclose limited information associated with the requested resource. The darkreader npm package used for website integration is not affected. This issue is fixed in version 4.9.126 for Firefox and version 4.9.128 for other browsers.
Title Dark Reader: Ability to request icon-like bitmap data from certain local web servers
Weaknesses CWE-200
CWE-346
CWE-668
References
Metrics cvssV3_1

{'score': 3.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-22T15:55:36.138Z

Reserved: 2026-09-16T16:22:31.542Z

Link: CVE-2026-92706

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-22T16:18:12.273

Modified: 2026-09-22T16:18:12.273

Link: CVE-2026-92706

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses