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-2026-1801MEDIUMLibsoup: libsoup: http request smuggling via malformed chunk headersEPSS 0.4%CVE-2025-58068MEDIUMEventlet affected by HTTP request smuggling in unparsed trailersEPSS 0.4%CVE-2026-75922MEDIUMReverse::Proxy versions before 0.04 for Perl allow HTTP request smuggling via a percent-decoded PATH_INFO written unencoded to the upstream request lineEPSS 0.4%CVE-2026-71554MEDIUMh2: Duplicate Host header could facilitate request smugglingEPSS 0.4%CVE-2026-11541HIGHInconsistent Interpretation of HTTP Requests in CICS Transaction Gateway for Multiplatforms.EPSS 0.4%CVE-2026-94194MEDIUMMint HTTP/1 client applies chunked framing when chunked is not the final transfer coding, enabling response smuggling through intermediariesEPSS 0.4%CVE-2026-94439HIGHHTTP/1 server connection desynchronization after 2xx CONNECT response in net/httpEPSS 0.4%CVE-2026-67181MEDIUMRouille 0.3.3 - 3.6.2 HTTP Request Smuggling via proxy Transfer-Encoding HeaderEPSS 0.4%CVE-2025-55018MEDIUMAn inconsistent interpretation of http requests ('http request smuggling') vulnerability in Fortinet FortiOS 7.6.0, FortiOS 7.4.0 through 7.EPSS 0.4%CVE-2024-9666MEDIUMOrg.keycloak/keycloak-quarkus-server: keycloak proxy header handling denial-of-service (dos) vulnerabilityEPSS 0.4%CVE-2024-22279MEDIUMGoRouter Denial of Service AttackEPSS 0.4%CVE-2025-1386MEDIUMQuery smuggling in ch-go libraryEPSS 0.4%CVE-2026-59900MEDIUMNetty codec-http2: Lack of Host Header Deduplication in HTTP/2→HTTP/1.x Translation Leads to Request Routing BypassEPSS 0.4%CVE-2026-55613MEDIUMuhttpd: HTTP request smuggling via ubus POST body parse-error desyncEPSS 0.4%CVE-2026-55614MEDIUMuhttpd vulnerable to HTTP request smuggling via case-sensitive Transfer-Encoding matchingEPSS 0.4%CVE-2026-51376MEDIUMAn issue in BitChat for iOS v1.15.0 allows a remote attacker to cause a denial of service via an unauthenticated MESSAGE packet into the mesEPSS 0.4%CVE-2026-15328HIGHIBM WebSphere Application Server and WebSphere Application Server Liberty is inconsistent Interpretation of HTTP RequestsEPSS 0.4%CVE-2023-23691HIGH Dell EMC PV ME5, versions ME5.1.0.0.0 and ME5.1.0.1.0, contains a Client-side desync Vulnerability. An unauthenticated attacker could potenEPSS 0.4%CVE-2026-2862MEDIUMSecurity Vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify AccessEPSS 0.4%CVE-2026-1491MEDIUMSecurity Vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify AccessEPSS 0.4%