Weaknesses of type CWE-20

5,888 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-2022-22184HIGHJunos OS and Junos OS Evolved: A BGP session will flap upon receipt of a specific, optional transitive attribute in version 22.3R1EPSS 0.7%CVE-2025-61809CRITICALColdFusion | Improper Input Validation (CWE-20)EPSS 0.7%CVE-2023-26069CRITICALCertain Lexmark devices through 2023-02-19 mishandle Input Validation (issue 3 of 4).EPSS 0.7%CVE-2017-12275—A vulnerability in the implementation of 802.11v Basic Service Set (BSS) Transition Management functionality in Cisco Wireless LAN ControlleEPSS 0.7%CVE-2023-31009HIGHNVIDIA DGX H100 BMC contains a vulnerability in the REST service, where an attacker may cause improper input validation. A successful exploiEPSS 0.7%CVE-2023-26070CRITICALCertain Lexmark devices through 2023-02-19 mishandle Input Validation (issue 4 of 4).EPSS 0.7%CVE-2022-34476CRITICALASN.1 parsing of an indefinite SEQUENCE inside an indefinite GROUP could have resulted in the parser accepting malformed ASN.1. This vulneraEPSS 0.7%CVE-2026-105895CRITICALAdobe Experience Manager | Improper Input Validation (CWE-20)EPSS 0.7%CVE-2025-65946HIGHRoo Code is Vulnerable to Potential Remote Code Execution via zsh Command Validation BugEPSS 0.7%CVE-2025-66259CRITICALAuthenticated Root Remote Code Execution through improper filtering of HTTP post request parametersEPSS 0.7%CVE-2026-28894HIGHA denial-of-service issue was addressed with improved input validation. This issue is fixed in iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.EPSS 0.7%CVE-2026-21548HIGHIn nr modem, there is a possible improper input validation. This could lead to remote denial of service with System execution privileges neeEPSS 0.7%CVE-2026-21553HIGHIn modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privilegesEPSS 0.7%CVE-2026-21554HIGHIn modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privilegesEPSS 0.7%CVE-2026-21550HIGHIn modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privilegesEPSS 0.7%CVE-2026-21549HIGHIn modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privilegesEPSS 0.7%CVE-2026-21555HIGHIn modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privilegesEPSS 0.7%CVE-2025-29821MEDIUMMicrosoft Dynamics Business Central Information Disclosure VulnerabilityEPSS 0.7%CVE-2026-21552HIGHIn modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privilegesEPSS 0.7%CVE-2026-21551HIGHIn modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privilegesEPSS 0.7%