CVE-2026-27192

Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. In versions 5.0.39 and below, origin validation uses startsWith for comparison, allowing attackers to bypass the check by registering a domain that shares a common prefix with an allowed...

CVE-2026-27192 Feathers has an origin validation bypass via prefix matching

Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. In versions 5.0.39 and below, origin validation uses startsWith for comparison, allowing attackers to bypass the check by registering a domain that shares a common prefix with an allowed...

CVE-2026-27192

Feathersjs vulnerability CVE-2026-27192 affects 5.0.39 and earlier. The origin validation in getAllowedOrigin() uses startsWith() to compare Referer against allowed origins, which can be bypassed by registering a domain with a shared prefix (e.g., https://target.com.attacker.com vs https://target...