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-2025-1867CRITICALHTTP Response Smuggling Vulnerability in libhvEPSS 0.4%CVE-2026-1002MEDIUMEclipse Vert.x Web static handler file access denialEPSS 0.4%CVE-2026-111750MEDIUMAIOHTTP: Pure-Python parser request smugglingEPSS 0.4%CVE-2026-50052LOWIn Vinyl Cache before 9.0.1 and Varnish Cache before 9.0.3, a deficiency in HTTP/2 request parsing can be exploited to launch a backend requEPSS 0.4%CVE-2026-42580MEDIUMNetty: HTTP Request Smuggling due to incorrect chunk size parsingEPSS 0.4%CVE-2023-54397CRITICALTornado before 6.3.3 HTTP Request Smuggling via Content-LengthEPSS 0.4%CVE-2024-34535MEDIUMIn Mastodon 4.1.6, API endpoint rate limiting can be bypassed by setting a crafted HTTP request header.EPSS 0.4%CVE-2025-59822MEDIUMHttp4s vulnerable to HTTP Request Smuggling due to improper handling of HTTP trailer sectionEPSS 0.4%CVE-2025-12811MEDIUMCloud Suite and Privilege Access Service– HTTP request smuggling vulnerabilityEPSS 0.4%CVE-2026-69216MEDIUMHttp4s: Ember chunk parser lenience (TE.TE request smuggling)EPSS 0.4%CVE-2025-12642MEDIUMHTTP Header Smuggling via Trailer MergeEPSS 0.4%CVE-2026-15396MEDIUMIBM WebSphere Application Server IBM WebSphere Application Server - Liberty HTTP Request SmugglingEPSS 0.4%CVE-2026-15634MEDIUMIBM WebSphere Application Server and IBM WebSphere Application Server - Liberty Request SmugglingEPSS 0.4%CVE-2023-53878MEDIUMMember Login Script 3.3 Client-Side Request Desynchronization VulnerabilityEPSS 0.4%CVE-2025-47905MEDIUMVarnish Cache before 7.6.3 and 7.7 before 7.7.1, and Varnish Enterprise before 6.0.13r14, allow client-side desync via HTTP/1 requests, becaEPSS 0.4%CVE-2026-40561MEDIUMStarlet versions through 0.31 for Perl allows HTTP Request Smuggling via Improper Header PrecedenceEPSS 0.4%CVE-2024-14029CRITICALTornado before 6.4.1 HTTP Request Smuggling via Transfer-EncodingEPSS 0.4%CVE-2026-103995LOWLenient parsing of integers for response body and chunk framingEPSS 0.4%CVE-2025-41235HIGHCVE-2025-41235: Spring Cloud Gateway Server Forwards Headers from Untrusted ProxiesEPSS 0.4%CVE-2025-53643LOWAIOHTTP is vulnerable to HTTP Request/Response Smuggling through incorrect parsing of chunked trailer sectionsEPSS 0.4%