Weaknesses of type CWE-346

697 results

Validação incorreta de origem em requisições cross-origin

A aplicação falha em validar corretamente a origem (domínio) de requisições HTTP, especialmente em cenários de CORS (Cross-Origin Resource Sharing) ou WebSockets. Um atacante pode contornar controles de segurança e executar ações em nome do usuário legítimo, ou acessar dados sensíveis que deveriam estar protegidos.

Example

Um banco implementa CORS permitindo qualquer origem (`Access-Control-Allow-Origin: *`) ou valida o header `Origin` de forma fraca (aceitando subdomínios descontrolados). Um site malicioso faz requisições ao banco em background enquanto o usuário está logado, roubando dados ou transferindo dinheiro.

How to mitigate

Valide a origem contra uma lista branca explícita de domínios confiáveis; implemente SameSite cookies; use tokens CSRF + verificação de origin no servidor; evite `Access-Control-Allow-Origin: *` em APIs sensíveis; valide o header `Origin` exatamente, sem wildcards ou regex permissivo.

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-2026-17743MEDIUMInsufficient 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-2026-15775MEDIUMInappropriate 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-2026-17846MEDIUMInappropriate 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-2026-13839MEDIUMInappropriate 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%