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-2024-35538MEDIUMTypecho v1.3.0 was discovered to contain a Client IP Spoofing vulnerability, which allows attackers to falsify their IP addresses by specifyEPSS 0.6%CVE-2026-8646HIGHIBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilitiesEPSS 0.6%CVE-2026-31842HIGHTinyproxy HTTP request parsing desynchronization via case-sensitive Transfer-Encoding handlingEPSS 0.6%CVE-2024-29643CRITICALAn issue in croogo v.3.0.2 allows an attacker to perform Host header injection via the feed.rss component.EPSS 0.6%CVE-2026-55087MEDIUMEtherpad: x-proxy-path header reflected into admin HTML/JS/CSS (cache-poisoning XSS) and concatenated into redirect (open-redirect)EPSS 0.6%CVE-2026-66357HIGHinets,httpd:HTTP Request Smuggling via obs-fold Header ContinuationEPSS 0.6%CVE-2026-73276HIGHinets, httpd: HTTP Request Smuggling via Whitespace-Before-Colon Header Dropping iEPSS 0.6%CVE-2025-32094MEDIUMAn issue was discovered in Akamai Ghost, as used for the Akamai CDN platform before 2025-03-26. Under certain circumstances, a client makingEPSS 0.6%CVE-2026-69204CRITICALHttp4s: Ember accepts Transfer-Encoding combined with Content-Length (CL.TE request smuggling)EPSS 0.6%CVE-2026-24033MEDIUMApache Traffic Server: Request smuggling via chunked extension quoted-string parsingEPSS 0.6%CVE-2022-38114MEDIUMClient-Side Desync Vulnerability EPSS 0.6%CVE-2026-58150HIGHApache Traffic Server: HTTP/2 requests with Transfer-Encoding are not rejected, allowing request smugglingEPSS 0.6%CVE-2026-73051MEDIUMactix-http before 3.12.1 HTTP Request Smuggling via CL.TEEPSS 0.6%CVE-2024-52304MEDIUMaiohttp vulnerable to request smuggling due to incorrect parsing of chunk extensionsEPSS 0.6%CVE-2026-105298MEDIUMPingora HTTP/2 :authority and Host header mismatch enables cache poisoning and host-based access control bypassEPSS 0.6%CVE-2026-86146HIGHApache bRPC: HTTP Request Smuggling and Header Injection via Lenient HTTP/1.1 Header ParsingEPSS 0.5%CVE-2024-23316HIGHPingAccess HTTP Request Desynchronization WeaknessEPSS 0.5%CVE-2021-33683MEDIUMSAP Web Dispatcher and Internet Communication Manager (ICM), versions - KRNL32NUC 7.21, 7.21EXT, 7.22, 7.22EXT, KRNL32UC 7.21, 7.21EXT, 7.22EPSS 0.5%CVE-2025-14523HIGHLibsoup: libsoup: duplicate host header handling causes host-parsing discrepancy (first- vs last-value wins)EPSS 0.5%CVE-2026-81356HIGHVisual Studio Code Security Feature Bypass VulnerabilityEPSS 0.5%