Dark Reader: Ability to request icon-like bitmap data from certain local web servers

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-92706
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-22 16:18:12 UTC
Updated2026-09-24 21:16:28 UTC
DescriptionDark 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.

Risk And Classification

Primary CVSS: v3.1 3.4 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

EPSS: 0.001720000 probability, percentile 0.058030000 (date 2026-09-25)

Problem Types: CWE-200 | CWE-346 | CWE-668 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor | CWE-346 CWE-346: Origin Validation Error | CWE-668 CWE-668: Exposure of Resource to Wrong Sphere

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.4LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
3.1CNADECLARED3.4LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Darkreader Darkreader affected < 4.9.128 Not specified

References

ReferenceSourceLinkTags
github.com/darkreader/darkreader/releases/tag/v4.9.128 [email protected] github.com
github.com/darkreader/darkreader/security/advisories/GHSA-jh5x-rphw-x532 [email protected] github.com
github.com/darkreader/darkreader/releases/tag/v4.9.126 [email protected] github.com
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