CVE-2026-92706 Dark Reader: Ability to request icon-like bitmap data from certain local web servers
A malicious website can trigger the Dark Reader extension to request local resources, potentially disclosing limited information from local web servers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-92706?
CVE-2026-92706 is a low-severity server-side request forgery vulnerability in darkreader, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-92706?
How do I fix CVE-2026-92706?
No fix has been published for CVE-2026-92706 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-92706 being exploited?
There is no known exploitation of CVE-2026-92706 in the wild and no public exploit code.
Sources
Also known as GHSA-jh5x-rphw-x532.