Weaknesses of type CWE-20

5,399 results

Validação inadequada de entrada

O software recebe dados do usuário ou de fontes externas, mas não verifica ou verifica de forma incompleta se esses dados têm as propriedades necessárias para processar com segurança. Isso permite que entradas malformadas, maliciosas ou inesperadas passem por controles e causem comportamentos indevidos — desde crashes até injeção de código.

Example

Uma aplicação web recebe um parâmetro numérico via GET, mas não valida se é realmente um número inteiro válido antes de usá-lo em uma consulta SQL. Um atacante envia um valor com caracteres especiais (ex: `1' OR '1'='1`), conseguindo injetar código SQL direto no banco de dados.

How to mitigate

Implemente validação rigorosa na entrada: defina o tipo, formato, comprimento e intervalo esperados; rejeite tudo que não se encaixe. Use listas de caracteres permitidos ('whitelist'), escape de dados para o contexto específico (SQL, HTML, URL) e bibliotecas de validação consolidadas. Nunca confie em dados do cliente.

CVE-2026-77540CRITICALA malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS EPSS 1.3%CVE-2026-77535CRITICALA malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi NetEPSS 1.3%CVE-2026-77542CRITICALA malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UID EnterEPSS 1.3%CVE-2026-26106HIGHMicrosoft SharePoint Server Remote Code Execution VulnerabilityEPSS 1.3%CVE-2020-14338—A flaw was found in Wildfly's implementation of Xerces, specifically in the way the XMLSchemaValidator class in the JAXP component of WildflEPSS 1.3%CVE-2020-15106MEDIUMImproper Input Validation in etcdEPSS 1.3%CVE-2021-22766HIGHA CWE-20: Improper Input Validation vulnerability exists in PowerLogic EGX100 (Versions 3.0.0 and newer) and PowerLogic EGX300 (All VersionsEPSS 1.3%CVE-2026-42537CRITICALApache Ranger: Remote Code Execution via JDBC URL InjectionEPSS 1.3%CVE-2023-30442MEDIUMIBM Db2 denial of serviceEPSS 1.3%CVE-2021-36321HIGHDell Networking X-Series firmware versions prior to 3.0.1.8 contain an improper input validation vulnerability. A remote unauthenticated attEPSS 1.3%CVE-2020-1662HIGHJunos OS and Junos OS Evolved: RPD crash due to BGP session flapping.EPSS 1.3%CVE-2022-2047LOWIn Eclipse Jetty versions 9.4.0 thru 9.4.46, and 10.0.0 thru 10.0.9, and 11.0.0 thru 11.0.9 versions, the parsing of the authority segment oEPSS 1.3%CVE-2023-41748HIGHRemote command execution due to improper input validation. The following products are affected: Acronis Cloud Manager (Windows) before buildEPSS 1.3%CVE-2023-41746HIGHRemote command execution due to improper input validation. The following products are affected: Acronis Cloud Manager (Windows) before buildEPSS 1.3%CVE-2026-85979HIGHCommand Injection in Puppet EnterpriseEPSS 1.3%CVE-2025-34108HIGHDisk Pulse Enterprise 9.0.34 Login Stack Buffer OverflowEPSS 1.3%CVE-2020-25626—A flaw was found in Django REST Framework versions before 3.12.0 and before 3.11.2. When using the browseable API viewer, Django REST FramewEPSS 1.3%CVE-2023-1973HIGHUndertow: unrestricted request storage leads to memory exhaustionEPSS 1.3%CVE-2020-3370MEDIUMCisco Content Security Management Appliance Filter Bypass VulnerabilityEPSS 1.3%CVE-2022-24905MEDIUMArgo CD login screen allows message spoofing if SSO is enabledEPSS 1.3%