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…

在 GitHub Advisory Database 阅读

2026/10/24 05:44，GitHub Advisory Database 发布了“Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value”（类型：漏洞公告）。严重程度为“中危”（medium）。相关技术：Python。CVE：CVE-2026-115877。