Origin Validation Error Affecting @feathersjs/authentication-oauth package, versions <5.0.40
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-FEATHERSJSAUTHENTICATIONOAUTH-15325871
- published23 Feb 2026
- disclosed19 Feb 2026
- creditAbdelwahed Madani Yousfi, Edoardo Geraci, Thomas Rinsma
Introduced: 19 Feb 2026
CVE-2026-27192 (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 Origin Validation Error in the getAllowedOrigin() function. An attacker can gain unauthorized access to sensitive information and potentially take over user accounts by initiating the OAuth flow from a malicious domain that shares a prefix with an allowed origin, thereby bypassing origin validation.