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-2026-17817MEDIUMInappropriate implementation in ReportingAndNEL in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data EPSS 0.2%CVE-2026-34928HIGHAn origin validation vulnerability in the Apex One/SEP agent could allow a local attacker to escalate privileges on affected installations. EPSS 0.2%CVE-2026-17885MEDIUMInappropriate implementation in Paint in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafEPSS 0.2%CVE-2026-17783MEDIUMInappropriate implementation in Loader in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a craEPSS 0.2%CVE-2026-17765MEDIUMInappropriate implementation in WebProtect in Google Chrome prior to 151.0.7922.72 allowed a remote attacker who had compromised the rendereEPSS 0.2%CVE-2026-17880MEDIUMInappropriate implementation in Autofill in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a cEPSS 0.2%CVE-2026-117912HIGHSame-origin policy bypass in the CSS Parsing and Computation componentEPSS 0.2%CVE-2026-17871MEDIUMInappropriate implementation in Passwords in Google Chrome prior to 151.0.7922.72 allowed a remote attacker who convinced a user to engage iEPSS 0.2%CVE-2026-17742MEDIUMInsufficient policy enforcement in Payments in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via EPSS 0.2%CVE-2026-45207HIGHAn origin validation vulnerability in the Apex One/SEP agent could allow a local attacker to escalate privileges on affected installations. EPSS 0.2%CVE-2026-17933MEDIUMInappropriate implementation in DOMStorage in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via aEPSS 0.2%CVE-2025-37734MEDIUMKibana Origin Validation ErrorEPSS 0.2%CVE-2026-17662MEDIUMInsufficient policy enforcement in Prefetch in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via EPSS 0.2%CVE-2026-17905MEDIUMInappropriate implementation in SurfaceCapture in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data vEPSS 0.2%CVE-2026-17833MEDIUMInappropriate implementation in Passwords in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a EPSS 0.2%CVE-2026-17904MEDIUMInsufficient policy enforcement in NFC in Google Chrome on Android prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin datEPSS 0.2%CVE-2026-17843MEDIUMInappropriate implementation in CSS in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafteEPSS 0.2%CVE-2026-17762MEDIUMInappropriate implementation in Chrome for iOS in Google Chrome on iOS prior to 151.0.7922.72 allowed a remote attacker to leak cross-originEPSS 0.2%CVE-2026-17981MEDIUMInappropriate implementation in Blink in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafEPSS 0.2%CVE-2026-17963MEDIUMInappropriate implementation in SVG in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafteEPSS 0.2%