Falhas do tipo CWE-346

697 resultados

Validação inadequada de origem (CORS/mesma origem)

A aplicação falha em validar corretamente a origem (domain/protocolo/porta) das requisições, permitindo que código malicioso de outros domínios acesse recursos protegidos. Isso quebra a política de mesma origem do navegador e pode expor dados sensíveis ou permitir ações não autorizadas.

Exemplo

Um servidor aceita qualquer valor no header Origin sem validação, ou valida de forma fraca (ex: substring matching). Um atacante hospeda um site malicioso que, ao ser visitado, faz requisições CORS para a aplicação vulnerável e consegue ler dados da vítima autenticada.

Como mitigar

Implemente validação rigorosa de origem: compare o header Origin contra uma whitelist explícita de domínios confiáveis (nunca use wildcards), valide protocolo e porta também, e desative CORS se não for necessário. Use credenciais com cautela em requisições cross-origin (credenciais + Access-Control-Allow-Origin: * é inseguro).

CVE-2026-19418HIGHTYPO3 CMS - Broken Access Control in Backend and Install ToolEPSS 0.2%CVE-2026-113800MEDIUMElectron: HID and USB permission checks can be attributed to the wrong originEPSS 0.2%CVE-2025-9265CRITICALAPI Authentication Bypass via Header Spoofing vulnerability in Kiloview NDI N30 ProductsEPSS 0.2%CVE-2026-100646HIGHSiYuan before v3.8.4 Authentication Bypass via Missing Origin HeaderEPSS 0.2%CVE-2026-63118MEDIUMMCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protectionEPSS 0.2%CVE-2026-13868MEDIUMInappropriate implementation in Network in Google Chrome on Android prior to 150.0.7871.47 allowed a remote attacker who had compromised theEPSS 0.2%CVE-2026-17754MEDIUMInappropriate implementation in Blink in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass same origin policy via a cEPSS 0.2%CVE-2026-17823MEDIUMInsufficient policy enforcement in WebXR in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass same origin policy via EPSS 0.2%CVE-2026-17787MEDIUMInappropriate implementation in DevTools in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass same origin policy via EPSS 0.2%CVE-2026-17883MEDIUMInappropriate implementation in Headless in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass same origin policy via EPSS 0.2%CVE-2026-17748MEDIUMInappropriate implementation in Extensions in Google Chrome prior to 151.0.7922.72 allowed a remote attacker who had compromised the rendereEPSS 0.2%CVE-2026-17846MEDIUMInappropriate implementation in Media in Google Chrome on Windows prior to 151.0.7922.72 allowed a remote attacker who had compromised the rEPSS 0.2%CVE-2026-17842MEDIUMInappropriate implementation in Chrome for iOS in Google Chrome on iOS prior to 151.0.7922.72 allowed a remote attacker who convinced a userEPSS 0.2%CVE-2026-15775MEDIUMInappropriate implementation in V8 in Google Chrome prior to 150.0.7871.125 allowed a remote attacker to bypass same origin policy via a craEPSS 0.2%CVE-2026-17743MEDIUMInsufficient policy enforcement in ControlledFrame in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass same origin pEPSS 0.2%CVE-2026-13839MEDIUMInappropriate implementation in CSS in Google Chrome prior to 150.0.7871.47 allowed a remote attacker to bypass same origin policy via a craEPSS 0.2%CVE-2026-17850MEDIUMInappropriate implementation in Permissions in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass same origin policy vEPSS 0.2%CVE-2026-17854MEDIUMInsufficient policy enforcement in WebMCP in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass same origin policy viaEPSS 0.2%CVE-2026-13838MEDIUMInappropriate implementation in CSS in Google Chrome prior to 150.0.7871.47 allowed a remote attacker to bypass same origin policy via a craEPSS 0.2%CVE-2026-17852MEDIUMInappropriate implementation in Media Router in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass same origin policy EPSS 0.2%