Falhas do tipo CWE-20

5.450 resultados

Validação inadequada de entrada

A aplicação recebe dados do usuário ou de fontes externas mas não valida (ou valida mal) se esses dados têm as propriedades necessárias para processamento seguro. Isso abre porta para injeção de código, buffer overflow, lógica corrompida e outros ataques que exploram dados malformados ou maliciosos.

Exemplo

Um formulário web aceita um CPF sem verificar se tem 11 dígitos numéricos, ou um app móvel recebe um ID de usuário em JSON sem confirmar se é um inteiro — atacantes exploram isso para acessar dados de outros usuários, executar queries SQL maliciosas ou causar erro de processamento.

Como mitigar

Implemente validação rigorosa na entrada: verifique tipo, comprimento, formato, intervalo de valores permitidos. Use whitelist (aceitar só o que você sabe ser seguro) em vez de blacklist. Valide tanto no cliente quanto no servidor, e use bibliotecas de parsing seguro para formatos complexos (XML, JSON).

CVE-2025-61684HIGHQuicly has assertion failuresEPSS 0.4%CVE-2019-15959MEDIUMCisco Small Business SPA500 Series IP Phones Local Script Execution VulnerabilityEPSS 0.4%CVE-2023-1732MEDIUMImproper random reading in CIRCLEPSS 0.4%CVE-2026-16434LOWAdminer before 5.5.1 X-Forwarded-Prefix Backslash BypassEPSS 0.4%CVE-2025-27388HIGHArbitrary URL Loading in WebView Leading to Token Leakage RiskEPSS 0.4%CVE-2026-45076MEDIUMSynapse pagination denial of serviceEPSS 0.4%CVE-2026-49444HIGHn8n: Python sandbox escapeEPSS 0.4%CVE-2023-49610HIGHMachineSense FeverWarn Improper Input ValidationEPSS 0.4%CVE-2018-0211—A vulnerability in specific CLI commands for the Cisco Identity Services Engine could allow an authenticated, local attacker to cause a deniEPSS 0.4%CVE-2025-0764MEDIUMwpForo Forum <= 2.4.1 - Authenticated (Subscriber+) Arbitrary File Read in updateEPSS 0.4%CVE-2026-73845MEDIUMCKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)EPSS 0.4%CVE-2023-28911MEDIUMArbitrary Channel Disconnection Resulting in Denial of ServiceEPSS 0.4%CVE-2026-54529MEDIUMSQLAdmin: Unvalidated sortBy parameter in `ModelView` bypasses `column_sortable_list`EPSS 0.4%CVE-2022-32204HIGHThere is an improper input verification vulnerability in Huawei printer product. Successful exploitation of this vulnerability may cause serEPSS 0.4%CVE-2025-43464MEDIUMA denial-of-service issue was addressed with improved input validation. This issue is fixed in macOS Tahoe 26.1. Visiting a website may leadEPSS 0.4%CVE-2026-63627MEDIUMmppx: Gas Draining with paddingEPSS 0.4%CVE-2026-63628MEDIUMmppx: Gas Draining with access listEPSS 0.4%CVE-2026-28907HIGHThe issue was addressed with improved input validation. This issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOEPSS 0.4%CVE-2025-0814MEDIUMCWE-20: Improper Input Validation vulnerability exists that could cause Denial-of-Service of the network services running on the product wheEPSS 0.4%CVE-2025-5455HIGHPossible denial of service when passing malformed data in a URL to qDecodeDataUrlEPSS 0.4%