Open Redirect Affecting @feathersjs/authentication-oauth package, versions <5.0.40
Threat Intelligence
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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-FEATHERSJSAUTHENTICATIONOAUTH-15325872
- published23 Feb 2026
- disclosed19 Feb 2026
- creditAbdelwahed Madani Yousfi, Edoardo Geraci, Thomas Rinsma
Introduced: 19 Feb 2026
CVE-2026-27191 (opens in a new tab)How to fix?
Upgrade @feathersjs/authentication-oauth to version 5.0.40 or higher.
Overview
@feathersjs/authentication-oauth is an oAuth 1 and 2 authentication for Feathers. Powered by Grant.
Affected versions of this package are vulnerable to Open Redirect due to the improper validation of redirect query parameter. An attacker can obtain a victim's access token and impersonate them by injecting a crafted URL that causes the browser to redirect to an attacker-controlled domain.