CVE-2025-68467: Dark Reader gives users the ability to request style sheets from local web servers

March 4, 2026 (updated March 5, 2026)

Dark Reader versions prior to 4.9.117 included a behavior where a website could request a style sheet from a locally running web server, for example http://localhost:8080/style.css, If an address was available and returned a text/css content type.

References

github.com/advisories/GHSA-x369-mcw8-8rvj
github.com/darkreader/darkreader
github.com/darkreader/darkreader/security/advisories/GHSA-x369-mcw8-8rvj
nvd.nist.gov/vuln/detail/CVE-2025-68467

Code Behaviors & Features

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