Echo has Arbitrary Scheme Injection in WWWRedirect/NonWWWRedirect Middlewares via X-Forwarded-Proto

影響: go:github.com/labstack/echo/v5 < 5.1.1 → 5.1.1, go:github.com/labstack/echo/v4 < 4.15.2 → 4.15.2

The c.Scheme() method in Echo (context.go:162-181) trusts the X-Forwarded-Proto, X-Forwarded-Protocol, and X-Url-Scheme request headers without validating that the value is http or https. The WWWRedirect() and NonWWWRedirect() middlewares use this unsanitized scheme to construct redirect URLs, allowing an attacker to inject arbitrary URI schemes into the Location response header. Affected Components - context.go:162-181 - Scheme() method returns attacker-controlled value verbatim - middleware/r…

GitHub Advisory Databaseで読む

2026/10/29 06:04、GitHub Advisory Databaseが「Echo has Arbitrary Scheme Injection in WWWRedirect/NonWWWRedirect Middlewares via X-Forwarded-Proto」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「警告」(medium) です。関連する技術: Go、GitHub。CVE: CVE-2026-118658。