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-2025-43859CRITICALh11 accepts some malformed Chunked-Encoding bodiesEPSS 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-2024-56523CRITICALRadware Cloud Web Application Firewall (WAF) before 2025-05-07 allows remote attackers to bypass firewall filters by placing random data in EPSS 0.6%CVE-2024-52304MEDIUMaiohttp vulnerable to request smuggling due to incorrect parsing of chunk extensionsEPSS 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-2026-50197HIGHSkipper: opaAuthorizeRequestWithBody filter bypasses OPA policy on Transfer-Encoding: chunked / HTTP/2 requestsEPSS 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-2026-58047MEDIUMHTTP Smuggling in cPanel allows potential leak of credentials.EPSS 0.5%CVE-2022-38114MEDIUMClient-Side Desync Vulnerability 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-2026-59249MEDIUMSign-tolerant HTTP/1 chunk-size parser in Mint enables response smuggling against strict intermediaries on pooled connectionsEPSS 0.5%CVE-2026-55087MEDIUMEtherpad: x-proxy-path header reflected into admin HTML/JS/CSS (cache-poisoning XSS) and concatenated into redirect (open-redirect)EPSS 0.5%CVE-2026-24880HIGHApache Tomcat: Request smuggling via invalid chunk extensionEPSS 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-2026-39805MEDIUMCL.CL HTTP request smuggling via duplicate Content-Length in banditEPSS 0.5%CVE-2026-93569HIGHIo.netty/netty-codec-http2: http/1 absolute-form host mismatch is translated to http/2 :authority, overriding the request-target authorityEPSS 0.5%CVE-2026-63379MEDIUMLibevent: HTTP Header smugglingEPSS 0.5%