Weaknesses of type CWE-444

365 results

Interpretação inconsistente de requisições HTTP (HTTP Request Smuggling)

Ocorre quando um proxy, load balancer ou firewall interpreta uma requisição HTTP de forma diferente do servidor backend. O atacante injeta headers ou manipula o tamanho do corpo da requisição (via Content-Length ou Transfer-Encoding) para fazer o intermediário e o servidor final processar requisições distintas. Isso permite contornar controles de segurança, envenenar caches, sequestrar sessões de outros usuários ou executar ataques no servidor.

Example

Um atacante envia uma requisição com dois headers Content-Length conflitantes, ou mistura Content-Length com Transfer-Encoding chunked. O proxy interpreta o fim da requisição em um ponto, enquanto o servidor backend interpreta em outro, fazendo com que parte do payload do atacante seja concatenado à próxima requisição de um usuário legítimo.

How to mitigate

Normalize e valide rigorosamente headers HTTP (Content-Length, Transfer-Encoding) em proxies e servidores; use HTTP/2 ou HTTP/3 que mitigam o problema; mantenha proxy e backend sincronizados quanto à interpretação de requisições; desabilite HTTP/1.0 se possível e aplique filtros que rejeitem requisições ambíguas ou malformadas.

CVE-2026-2835CRITICALHTTP Request Smuggling via HTTP/1.0 and Transfer-Encoding MisparsingEPSS 0.8%CVE-2024-22081CRITICALAn issue was discovered in Elspec G5 digital fault recorder versions 1.1.4.15 and before. Unauthenticated memory corruption can occur in theEPSS 0.8%CVE-2024-52530HIGHGNOME libsoup before 3.6.0 allows HTTP request smuggling in some configurations because '\0' characters at the end of header names are ignorEPSS 0.8%CVE-2021-34559MEDIUMA vulnerability in WirelessHART-Gateway <= 3.0.8 may allow remote attackers to rewrite links and URLs in cached pages to arbitrary stringsEPSS 0.8%CVE-2020-5207MEDIUMRequest smuggling is possible in Ktor when both chunked TE and content length specifiedEPSS 0.8%CVE-2023-38697MEDIUM protocol-http1 HTTP Request/Response Smuggling vulnerabilityEPSS 0.8%CVE-2026-62899MEDIUM.NET Security Feature Bypass VulnerabilityEPSS 0.7%CVE-2026-9190CRITICALHTTP request smuggling in Progress MarkLogic ServerEPSS 0.7%CVE-2020-5220MEDIUMAbility to expose data in Sylius by using an unintended serialisation groupEPSS 0.7%CVE-2026-28368HIGHUndertow: undertow: request smuggling via inconsistent header parsingEPSS 0.7%CVE-2026-28367HIGHUndertow: undertow: request smuggling via `\r\r\r` as a header block terminatorEPSS 0.7%CVE-2025-58056LOWNetty is vulnerable to request smuggling due to incorrect parsing of chunk extensionsEPSS 0.7%CVE-2026-24880HIGHApache Tomcat: Request smuggling via invalid chunk extensionEPSS 0.7%CVE-2026-33870HIGHNetty: HTTP Request Smuggling via Chunked Extension Quoted-String ParsingEPSS 0.7%CVE-2023-33987HIGHRequest smuggling and request concatenation in SAP Web DispatcherEPSS 0.7%CVE-2026-28369HIGHUndertow: undertow: request smuggling via malformed http request headersEPSS 0.7%CVE-2026-27690CRITICALHTTP Request Smuggling in SAP ApprouterEPSS 0.7%CVE-2024-27439MEDIUMApache Wicket: Possible bypass of CSRF protectionEPSS 0.7%CVE-2026-13763HIGHHTTP/2 Stream Parser Confusion Body-Inspection Bypass in AWS Application Load Balancer with AWS WAFEPSS 0.7%CVE-2026-73257CRITICALMongoose: Content-Length + Transfer-Encoding coexistence enables request smugglingEPSS 0.7%