CVE-2026-39805— Bandit 环境问题漏洞

CL.CL HTTP request smuggling via duplicate Content-Length in bandit

Inconsistent Interpretation of HTTP Requests vulnerability in mtrudel bandit allows HTTP request smuggling via duplicate Content-Length headers. 'Elixir.Bandit.Headers':get_content_length/1 in lib/bandit/headers.ex uses List.keyfind/3, which returns only the first matching header. When a request contains two Content-Length headers with different values, Bandit silently accepts it, uses the first value to read the body, and dispatches the remaining bytes as a second pipelined request on the same keep-alive connection. RFC 9112 §6.3 requires recipients to treat this as an unrecoverable framing error. When Bandit sits behind a proxy that picks the last Content-Length value and forwards the request rather than rejecting it, an unauthenticated attacker can smuggle requests past edge WAF rules, path-based ACLs, rate limiting, and audit logging. This issue affects bandit: before 1.11.0.

N/A

HTTP请求的解释不一致性(HTTP请求私运)

Bandit 环境问题漏洞

Bandit是Mat Trudel个人开发者的一款高性能HTTP与WebSocket服务器。 Bandit 1.11.0之前版本存在环境问题漏洞，该漏洞源于对重复Content-Length标头的处理不一致，可能导致HTTP请求夹带攻击。

N/A

N/A