Weaknesses of type CWE-20

5,439 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-2026-2898MEDIUMfunadmin Backend Endpoint AuthCloudService.php getMember deserializationEPSS 0.4%CVE-2024-47866HIGHRGW DoS attack with empty HTTP header in S3 object copyEPSS 0.4%CVE-2025-15284MEDIUMarrayLimit bypass in bracket notation allows DoS via memory exhaustionEPSS 0.4%CVE-2026-59650CRITICALMTI/A0 DH agreement exponentiates unvalidated peer valueEPSS 0.4%CVE-2026-8959CRITICALSandbox escape due to incorrect boundary conditions in the Widget: Win32 componentEPSS 0.4%CVE-2020-3556HIGHCisco AnyConnect Secure Mobility Client Arbitrary Code Execution VulnerabilityEPSS 0.4%CVE-2026-85239HIGHMISP Event Template Definition Validation Bypass Allows Persistent Denial of ServiceEPSS 0.4%CVE-2026-33758CRITICALOpenBao has Reflected XSS in its OIDC authentication error messageEPSS 0.4%CVE-2026-56722MEDIUMDompdf: Local file read due to improper file path validation in SVG images encoded as data-URIEPSS 0.4%CVE-2025-40836HIGHEricsson Indoor Connect 8855 - Improper Input Validation VulnerabilityEPSS 0.4%CVE-2026-40871HIGHmailcow: dockerized vulnerable to Second Order SQL Injection in quarantine category via APIEPSS 0.4%CVE-2026-42459HIGHfree5GC: Improper Input Validation and Generation of Error Message Containing Sensitive Information in github.com/free5gc/udmEPSS 0.4%CVE-2023-39404—Vulnerability of input parameter verification in certain APIs in the window management module. Successful exploitation of this vulnerabilityEPSS 0.4%CVE-2023-39390—Vulnerability of input parameter verification in certain APIs in the window management module. Successful exploitation of this vulnerabilityEPSS 0.4%CVE-2026-17109MEDIUMIBM i is Affected By Multiple Vulnerabilities in SQLEPSS 0.4%CVE-2022-30786MEDIUMA crafted NTFS image can cause a heap-based buffer overflow in ntfs_names_full_collate in NTFS-3G through 2021.8.22.EPSS 0.4%CVE-2023-39382— Input verification vulnerability in the audio module. Successful exploitation of this vulnerability may cause virtual machines (VMs) to resEPSS 0.4%CVE-2022-30789MEDIUMA crafted NTFS image can cause a heap-based buffer overflow in ntfs_check_log_client_array in NTFS-3G through 2021.8.22.EPSS 0.4%CVE-2025-6545CRITICALpbkdf2 silently returns predictable uninitialized/zero-filled memory for non-normalized or unimplemented algos supported by Node.jsEPSS 0.4%CVE-2023-37241—Input verification vulnerability in the WMS API. Successful exploitation of this vulnerability may cause the device to restart.EPSS 0.4%