Weaknesses of type CWE-444

320 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-2024-27439MEDIUMApache Wicket: Possible bypass of CSRF protectionEPSS 0.7%CVE-2025-58056LOWNetty is vulnerable to request smuggling due to incorrect parsing of chunk extensionsEPSS 0.7%CVE-2026-28369HIGHUndertow: undertow: request smuggling via malformed http request headersEPSS 0.7%CVE-2026-13763HIGHHTTP/2 Stream Parser Confusion Body-Inspection Bypass in AWS Application Load Balancer with AWS WAFEPSS 0.7%CVE-2026-2833CRITICALHTTP Request Smuggling via Premature UpgradeEPSS 0.7%CVE-2026-73548HIGHEnvoy: Cross-user response poisoning via a generic (non-WebSocket) HTTP upgrade on Envoy's shared backend poolEPSS 0.7%CVE-2024-9622MEDIUMResteasy-netty4-cdi: resteasy-netty4: resteasy-reactor-netty: http request smuggling leading to client timeouts in resteasy-netty4EPSS 0.6%CVE-2024-53868HIGHApache Traffic Server: Malformed chunked message body allows request smugglingEPSS 0.6%CVE-2026-33870HIGHNetty: HTTP Request Smuggling via Chunked Extension Quoted-String ParsingEPSS 0.6%CVE-2026-23527HIGHh3 v1 has Request Smuggling (TE.TE) issueEPSS 0.6%CVE-2025-61258HIGHOutsystems Platform Server 11.18.1.37828 allows attackers to cause a denial of service via a crafted content-length value mismatching the boEPSS 0.6%CVE-2026-42581MEDIUMNetty: HTTP/1.0 TE+CL Coexistence Bypasses Smuggling SanitizationEPSS 0.6%CVE-2026-13762HIGHHTTP/2 Stream Parser Confusion Body-Inspection Bypass in Amazon CloudFront with AWS WAFEPSS 0.6%CVE-2024-56908MEDIUMIn Perfex Crm < 3.2.1, an authenticated attacker can send a crafted HTTP POST request to the affected upload_sales_file endpoint. By providiEPSS 0.6%CVE-2026-74848HIGHApache APISIX: Cross-user response poisoning in serverless pluginsEPSS 0.6%CVE-2024-38494HIGHSymantec Privileged Access Manager Remote Command Execution vulnerabilityEPSS 0.6%CVE-2020-5218MEDIUMAbility in Sylius to switch channels via GET parameter enabled in production environmentsEPSS 0.6%CVE-2024-35538MEDIUMTypecho v1.3.0 was discovered to contain a Client IP Spoofing vulnerability, which allows attackers to falsify their IP addresses by specifyEPSS 0.6%CVE-2026-8646HIGHIBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilitiesEPSS 0.6%CVE-2026-63382CRITICALlibevent evhttp: Multiple HTTP Parser Bugs Enable Request SmugglingEPSS 0.6%