Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value

影響: pip:Twisted <= 26.4.0 → 26.10.0rc1

An incomplete header-value validation (CWE-444) in the Twisted HTTP server lets a bare carriage return or line feed in a header value hide a following header from the parser. twisted.web.http.HTTPChannel.headerReceived rejects a NUL byte in a header value but not a bare CR or LF, even though RFC 9110 section 5.5 requires a recipient to reject all three. Because the channel splits requests only on CRLF, a value carrying a bare LF and a second header arrives as one line, so the second header is f…

GitHub Advisory Databaseで読む

2026/10/24 05:44、GitHub Advisory Databaseが「Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value」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: Python。CVE: CVE-2026-115877。