Weaknesses of type CWE-444

322 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-2026-68006CRITICALAn issue in Puma v.5.0.0 and before v.8.0.3 allows an attacker to execute arbitrary code via the ext/puma_http11/http11_parser.rl fileEPSS 0.4%CVE-2026-1491MEDIUMSecurity Vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify AccessEPSS 0.4%CVE-2026-2862MEDIUMSecurity Vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify AccessEPSS 0.4%CVE-2023-53878MEDIUMMember Login Script 3.3 Client-Side Request Desynchronization VulnerabilityEPSS 0.4%CVE-2026-58150HIGHApache Traffic Server: HTTP/2 requests with Transfer-Encoding are not rejected, allowing request smugglingEPSS 0.4%CVE-2023-54397CRITICALTornado before 6.3.3 HTTP Request Smuggling via Content-LengthEPSS 0.4%CVE-2026-42580MEDIUMNetty: HTTP Request Smuggling due to incorrect chunk size parsingEPSS 0.4%CVE-2026-40561MEDIUMStarlet versions through 0.31 for Perl allows HTTP Request Smuggling via Improper Header PrecedenceEPSS 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-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-2024-14029CRITICALTornado before 6.4.1 HTTP Request Smuggling via Transfer-EncodingEPSS 0.4%CVE-2026-84363MEDIUMHono: Query parser reads parameters after the URL fragment, causing cache-key and proxy interpretation differentialsEPSS 0.3%CVE-2025-12642MEDIUMHTTP Header Smuggling via Trailer MergeEPSS 0.3%CVE-2025-41235HIGHCVE-2025-41235: Spring Cloud Gateway Server Forwards Headers from Untrusted ProxiesEPSS 0.3%CVE-2025-12811MEDIUMCloud Suite and Privilege Access Service– HTTP request smuggling vulnerabilityEPSS 0.3%CVE-2026-88008HIGHTraefik: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') and Incorrect AuthorizationEPSS 0.3%CVE-2026-93573MEDIUMIo.netty/netty-codec-http: netty split transfer-encoding fields bypass final-chunked validation and enable request smugglingEPSS 0.3%CVE-2026-73051MEDIUMactix-http before 3.12.1 HTTP Request Smuggling via CL.TEEPSS 0.3%CVE-2026-69204CRITICALHttp4s: Ember accepts Transfer-Encoding combined with Content-Length (CL.TE request smuggling)EPSS 0.3%CVE-2026-66357HIGHinets,httpd:HTTP Request Smuggling via obs-fold Header ContinuationEPSS 0.3%