CVE Watch9 de nov. de 2026

CVE-2026-125109

Rack is a modular Ruby web server interface. From 3.0 until 3.1.23 and 3.2.8, Rack::Request#host_with_port, #base_url, and #url can return a

CVSS

4.8

Média

EPSS

—

KEV

—

Exploit Today

—

0-100

Publicado: 9 de nov. de 2026 · Última mod.: 9 de nov. de 2026 · CWE-1286

EPSS · 30d

Ainda não há histórico EPSS suficiente.

Descrição técnica

Rack is a modular Ruby web server interface. From 3.0 until 3.1.23 and 3.2.8, Rack::Request#host_with_port, #base_url, and #url can return an attacker-controlled invalid authority from Host, X-Forwarded-Host, or Forwarded: host= verbatim. Applications without an independent host allowlist that use these methods for absolute URLs, redirects, or origin-dependent checks can emit attacker-chosen delimiters, enabling redirect manipulation, string-based allowlist bypass, or unescaped markup reflection. Rails overrides these methods and is not expected to be affected. This issue is fixed in versions 3.1.23 and 3.2.8.

Referências oficiais

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