Weaknesses of type CWE-444

323 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-2026-65370HIGHServiceTalk HTTP/1.x incorrectly handles malformed Transfer-Encoding which could result in request smuggling attacks. This vulnerability is EPSS 0.2%CVE-2026-32240MEDIUMCap'n Proto: Integer overflow in KJ-HTTP chunk sizeEPSS 0.2%CVE-2026-4742LOWHTTP Request Smuggling in visualfc/liteideEPSS 0.2%CVE-2026-32239MEDIUMCap'n Proto has an integer overflow in KJ-HTTPEPSS 0.2%CVE-2026-10841MEDIUMMultiple security vulnerabilities may affect IBM WebSphere Liberty that is shipped with IBM CICS TX Advanced.EPSS 0.2%CVE-2026-34441MEDIUMcpp-httplib: HTTP Request Smuggling via Unconsumed GET Request BodyEPSS 0.2%CVE-2025-4600HIGHHTTP Request Smuggling in Google Cloud Classic Application Load Balancer due to Improper Chunked Encoding ValidationEPSS 0.2%CVE-2022-39163MEDIUMIBM Cognos Controller HTTP response smugglingEPSS 0.2%CVE-2024-8912HIGHHTTP Request Smuggling in LookerEPSS 0.2%CVE-2026-66338MEDIUMLibsoup: libsoup: http request smuggling via permissive chunk-size parsing in soup_body_input_stream_read_chunked()EPSS 0.2%CVE-2026-41853MEDIUMSpring Framework Multipart Request Smuggling in Spring MVC and WebFluxEPSS 0.2%CVE-2026-72587MEDIUMInstatic - Cache Poisoning via Unauthenticated Server Island EndpointEPSS 0.2%CVE-2026-92238CRITICALAmbiguous parsing of mail headersEPSS 0.2%CVE-2026-64785MEDIUMSwiftNIO HTTP/2 was missing validation on inbound HEADERS frames that let CR, LF, NUL, SP and other control characters reach an HTTP/1.1 bacEPSS 0.2%CVE-2026-26365MEDIUMAkamai Ghost on Akamai CDN edge servers before 2026-02-06 mishandles processing of custom hop-by-hop HTTP headers, where an incoming requestEPSS 0.2%CVE-2025-31958LOWHCL BigFix Service Management (SM) is susceptible to HTTP Request SmugglingEPSS 0.2%CVE-2026-16728MEDIUMundici vulnerable to downstream response desynchronization via retry interceptorEPSS 0.2%CVE-2026-44546LOWHeader injection via WebSocket upgrade parser differential allows ASGI scope header spoofingEPSS 0.2%CVE-2026-48932LOWA flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from EPSS 0.2%CVE-2026-46342LOWNuxt: `__nuxt_island` endpoint does not bind responses to request props, enabling shared-cache poisoningEPSS 0.1%