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-2026-93574MEDIUMIo.netty/netty-codec-http: netty: http request smuggling via post-digit whitespace in chunk-size parsingEPSS 0.5%CVE-2026-71324HIGHTraefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive poolEPSS 0.5%CVE-2025-23167MEDIUMA flaw in Node.js 20's HTTP parser allows improper termination of HTTP/1 headers using `\r\n\rX` instead of the required `\r\n\r\n`. This inEPSS 0.5%CVE-2025-4366HIGHRequest Smuggling Vulnerability in PingoraEPSS 0.5%CVE-2026-69217HIGHHttp4s: Ember Server accepts duplicate Content-Length headersEPSS 0.5%CVE-2025-12874MEDIUMHTTP Request Smuggling in Quest Coexistence Manager for NotesEPSS 0.5%CVE-2026-1525MEDIUMundici is vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')EPSS 0.5%CVE-2024-20915MEDIUMVulnerability in the Oracle Application Object Library product of Oracle E-Business Suite (component: Login - SSO). Supported versions thatEPSS 0.5%CVE-2026-40560HIGHStarman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header PrecedenceEPSS 0.5%CVE-2024-49768CRITICALWaitress has request processing race condition in HTTP pipelining with invalid first requestEPSS 0.5%CVE-2026-73257CRITICALMongoose: Content-Length + Transfer-Encoding coexistence enables request smugglingEPSS 0.5%CVE-2023-51701MEDIUM@fastify-reply-from JSON Content-Type parsing confusionEPSS 0.5%CVE-2023-49584MEDIUMClient-Side Desynchronization vulnerability in SAP Fiori LaunchpadEPSS 0.5%CVE-2025-6442MEDIUMRuby WEBrick read_header HTTP Request Smuggling VulnerabilityEPSS 0.5%CVE-2026-11806HIGHIBM WebSphere Application Server Liberty is affected by a an arbitrary file read vulnerabilityEPSS 0.5%CVE-2023-52354HIGHchasquid before 1.13 allows SMTP smuggling because LF-terminated lines are accepted.EPSS 0.5%CVE-2026-28497CRITICALTinyWeb: Integer Overflow in `_Val` (HTTP Request Smuggling)EPSS 0.5%CVE-2026-58153MEDIUMApache Traffic Server: HTTP/2 to HTTP/1 conversion forwards origin trailers to clients unsafelyEPSS 0.5%CVE-2026-4700CRITICALMitigation bypass in the Networking: HTTP componentEPSS 0.5%CVE-2023-50811MEDIUMAn issue discovered in SELESTA Visual Access Manager 4.38.6 allows attackers to modify the “computer” POST parameter related to the ID of a EPSS 0.5%