Origin Validation Error Affecting darkreader package, versions <4.9.117
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-DARKREADER-15441035
- published9 Mar 2026
- disclosed4 Mar 2026
- creditBrian Carpenter
Introduced: 4 Mar 2026
NewCVE-2025-68467 (opens in a new tab)How to fix?
Upgrade darkreader to version 4.9.117 or higher.
Overview
darkreader is a Dark mode for every website
Affected versions of this package are vulnerable to Origin Validation Error via the process of requesting style sheets from a locally running web server. An attacker can access sensitive information by tricking a user into visiting a malicious website that causes the extension to load resources from the user's local server.
Note: According to the maintainer, the issue does not affect developers using the darkreader NPM package for website integration. Developers using the setFetchMethod() API must ensure the cross-origin requests are restricted to the intended scope.