Exposure of Sensitive System Information to an Unauthorized Control Sphere 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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-FEATHERSJSAUTHENTICATIONOAUTH-15325870
- published23 Feb 2026
- disclosed19 Feb 2026
- creditUnknown
Introduced: 19 Feb 2026
CVE-2026-27193 (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 Exposure of Sensitive System Information to an Unauthorized Control Sphere in the session cookies. An attacker can access sensitive internal infrastructure details, such as API keys, service tokens, and internal IP addresses, by decoding the HTTP request headers.