CVE-2026-34831
Gravedad CVSS v3.1:
MEDIA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
02/04/2026
Última modificación:
16/04/2026
Descripción
*** Pendiente de traducción *** Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Files#fail sets the Content-Length response header using String#size instead of String#bytesize. When the response body contains multibyte UTF-8 characters, the declared Content-Length is smaller than the number of bytes actually sent on the wire. Because Rack::Files reflects the requested path in 404 responses, an attacker can trigger this mismatch by requesting a non-existent path containing percent-encoded UTF-8 characters. This results in incorrect HTTP response framing and may cause response desynchronization in deployments that rely on the incorrect Content-Length value. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.
Impacto
Puntuación base 3.x
4.80
Gravedad 3.x
MEDIA
Productos y versiones vulnerables
| CPE | Desde | Hasta |
|---|---|---|
| cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:* | 2.2.23 (excluyendo) | |
| cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:* | 3.0.0 (incluyendo) | 3.1.21 (excluyendo) |
| cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:* | 3.2.0 (incluyendo) | 3.2.6 (excluyendo) |
Para consultar la lista completa de nombres de CPE con productos y versiones, ver esta página