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-2026-78660HIGHHTTP/2 transport accepts malformed framing-related headers in net/httpEPSS 0.5%CVE-2026-81356HIGHVisual Studio Code Security Feature Bypass VulnerabilityEPSS 0.5%CVE-2026-92238CRITICALAmbiguous parsing of mail headersEPSS 0.5%CVE-2026-58155CRITICALApache Traffic Server: Header-name length truncation enables header aliasing and request smugglingEPSS 0.5%CVE-2025-4366HIGHRequest Smuggling Vulnerability in PingoraEPSS 0.5%CVE-2026-28497CRITICALTinyWeb: Integer Overflow in `_Val` (HTTP Request Smuggling)EPSS 0.5%CVE-2024-44775HIGHkmqtt v0.2.7 is vulnerable to Denial of Service (DoS) due to a Null Pointer Exception. A remote attacker can cause the broker to crash by seEPSS 0.5%CVE-2026-94439HIGHHTTP/1 server connection desynchronization after 2xx CONNECT response in net/httpEPSS 0.5%CVE-2026-77756LOWApache Tomcat: Transfer-Encoding honored for HTTP/1.0 requestsEPSS 0.5%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 0.5%CVE-2026-82672MEDIUMUnvalidated chunk-size line tail in Mint HTTP/1 client enables response smuggling against strict intermediaries on pooled connectionsEPSS 0.5%CVE-2026-73812HIGHinets, httpd: HTTP Request Smuggling via Transfer-Encoding and Content-LengthEPSS 0.5%CVE-2026-59249MEDIUMSign-tolerant HTTP/1 chunk-size parser in Mint enables response smuggling against strict intermediaries on pooled connectionsEPSS 0.5%CVE-2024-21088HIGHVulnerability in the Oracle Production Scheduling product of Oracle E-Business Suite (component: Import Utility). Supported versions that aEPSS 0.5%CVE-2026-58047MEDIUMHTTP Smuggling in cPanel allows potential leak of credentials.EPSS 0.5%CVE-2026-63379MEDIUMLibevent: HTTP Header smugglingEPSS 0.5%CVE-2026-50197HIGHSkipper: opaAuthorizeRequestWithBody filter bypasses OPA policy on Transfer-Encoding: chunked / HTTP/2 requestsEPSS 0.5%CVE-2026-85078MEDIUMsanic chunked trailer request smuggling allows hidden second request executionEPSS 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-2026-55458LOWCaddy: RFC 7230 §6.1 compliance issue / Hop-by-hop headers that leak throughEPSS 0.5%