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-2026-17817MEDIUMInappropriate 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%