Weaknesses of type CWE-20

5,418 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-2024-38055MEDIUMMicrosoft Windows Codecs Library Information Disclosure VulnerabilityEPSS 0.8%CVE-2026-45558CRITICALRoxy-WI: Authenticated RCE on every managed HAProxy load balancer via `option` field config injection in section saveEPSS 0.8%CVE-2018-0395HIGHCisco FXOS and NX-OS Software Link Layer Discovery Protocol Denial of Service VulnerabilityEPSS 0.8%CVE-2024-23655HIGHAttacker can prevent users from accessing received emailsEPSS 0.8%CVE-2026-21279HIGHColdFusion | Improper Input Validation (CWE-20)EPSS 0.8%CVE-2022-31041HIGHInsufficient content-type validation for uploaded files in open-formsEPSS 0.8%CVE-2026-27282HIGHColdFusion | Improper Input Validation (CWE-20)EPSS 0.8%CVE-2021-25255HIGHYandex Browser Lite for Android prior to version 21.1.0 allows remote attackers to cause a denial of service.EPSS 0.8%CVE-2024-41120CRITICALstreamlit-geospatial blind SSRF in pages/9_🔲_Vector_Data_Visualization.pyEPSS 0.8%CVE-2023-25533HIGHNVIDIA DGX H100 BMC contains a vulnerability in the web UI, where an attacker may cause improper input validation. A successful exploit of tEPSS 0.8%CVE-2026-59878HIGHApache ActiveMQ AMQP, Apache ActiveMQ, Apache ActiveMQ All: AMQP NIO negative frame size validation bypass leading to DoSEPSS 0.8%CVE-2026-49432HIGHApache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: STOMP negative content-length enables denial of serviceEPSS 0.8%CVE-2024-6239HIGHPoppler: pdfinfo: crash in broken documents when using -dests parameterEPSS 0.8%CVE-2023-42448HIGHHydra's contestation period in head datum can be modified during Close transaction, allowing malicious participant to freely modify the contestation deadlineEPSS 0.8%CVE-2021-39220LOWBypass of image blocking in Nextcloud MailEPSS 0.8%CVE-2023-29451MEDIUMDenial of service caused by a bug in the JSON parserEPSS 0.8%CVE-2023-38728MEDIUMIBM Db2 denial of serviceEPSS 0.8%CVE-2023-29194MEDIUMvitess allows users to create keyspaces that can deny access to already existing keyspacesEPSS 0.8%CVE-2023-38740MEDIUMIBM Db2 denial of serviceEPSS 0.8%CVE-2023-38720MEDIUMIBM Db2 denial of serviceEPSS 0.8%