Falhas do tipo CWE-346

698 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-2026-16375CRITICALSite isolation issue in the Networking: HTTP componentEPSS 0.2%CVE-2026-74981HIGHSite isolation issue in the Audio/Video: Web Codecs componentEPSS 0.2%CVE-2026-11132MEDIUMInsufficient policy enforcement in Paint in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass same origin policy via EPSS 0.2%CVE-2026-84482HIGHWWBN AVideo Cross-Site Request Forgery via get_domain() validationEPSS 0.2%CVE-2026-91201MEDIUMDocsGPT through 0.20.0 OAuth Token Disclosure via Wildcard postMessageEPSS 0.2%CVE-2026-92360MEDIUMag-ui-protocol ag-ui Event Application Layer agent.ts prepareRunAgentInput origin validationEPSS 0.2%CVE-2026-11133MEDIUMInsufficient policy enforcement in Paint in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass same origin policy via EPSS 0.2%CVE-2026-27478CRITICALUnity Catalog has a JWT Issuer Validation Bypass Allows Complete User ImpersonationEPSS 0.2%CVE-2026-118651MEDIUMEcho: Reverse Proxy Forwards Attacker-Supplied X-Real-IP to Upstream by DefaultEPSS 0.2%CVE-2026-46555HIGHWhatsApp MCP: Unauthenticated bridge API allows message sending and arbitrary file exfiltrationEPSS 0.2%CVE-2026-8971MEDIUMSame-origin policy bypass in the Networking: JAR componentEPSS 0.2%CVE-2024-45354MEDIUMxiaomi shop application Webview has code execution vulnerabilityEPSS 0.2%CVE-2026-82121HIGHOrigin Validation Error Vulnerability in HiRDBEPSS 0.2%CVE-2024-28883HIGHBIG-IP APM browser network access VPN client vulnerabilityEPSS 0.2%CVE-2026-26861HIGHCleverTap Web SDK version 1.15.2 and earlier is vulnerable to Cross-Site Scripting (XSS) via window.postMessage. The handleCustomHtmlPreviewEPSS 0.2%CVE-2026-34373MEDIUMParse Server: GraphQL API endpoint ignores CORS origin restrictionEPSS 0.2%CVE-2024-2377HIGHA vulnerability exists in the too permissive HTTP response header web server settings of the SDM600. An attacker can take advantage of this EPSS 0.2%CVE-2026-117860HIGHSame-origin policy bypass in the DOM: Navigation componentEPSS 0.2%CVE-2026-13034MEDIUMInappropriate implementation in Passwords in Google Chrome prior to 149.0.7827.197 allowed a remote attacker who had compromised the rendereEPSS 0.2%CVE-2026-13021MEDIUMInappropriate implementation in DeviceBoundSessionCredentials in Google Chrome prior to 149.0.7827.197 allowed a remote attacker to bypass sEPSS 0.2%