Falhas do tipo CWE-20

5.399 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-2021-21394MEDIUMDenial of service (via resource exhaustion) due to improper input validation on third-party identifier endpointsEPSS 1.5%CVE-2026-0933HIGHOS Command Injection in `wrangler pages deploy`EPSS 1.5%CVE-2024-21663CRITICALRemote code execution on ReconServer due to improper input sanitization on the prips commandEPSS 1.5%CVE-2023-24866MEDIUMMicrosoft PostScript and PCL6 Class Printer Driver Information Disclosure VulnerabilityEPSS 1.5%CVE-2023-24865MEDIUMMicrosoft PostScript and PCL6 Class Printer Driver Information Disclosure VulnerabilityEPSS 1.5%CVE-2019-1766HIGHCisco IP Phone 8800 Series File Upload Denial of Service VulnerabilityEPSS 1.5%CVE-2021-20206—An improper limitation of path name flaw was found in containernetworking/cni in versions before 0.8.1. When specifying the plugin to load iEPSS 1.5%CVE-2022-29169HIGHReDoS on endpoint html5client/useragent in BigBlueButtonEPSS 1.5%CVE-2023-31039CRITICALApache bRPC: ServerOptions.pid_file may cause arbitrary code executionEPSS 1.5%CVE-2022-23770HIGHWISA Smart Wing CMS Remote Command Execution VulnerabilityEPSS 1.5%CVE-2022-26336—A carefully crafted TNEF file can cause an out of memory exceptionEPSS 1.5%CVE-2021-1513HIGHCisco SD-WAN Software vDaemon Denial of Service VulnerabilityEPSS 1.5%CVE-2023-22886HIGHApache Airflow JDBC Provider: RCE VulnerabilityEPSS 1.5%CVE-2019-12633MEDIUMCisco Unified Contact Center Express Request Processing Server-Side Request Forgery VulnerabilityEPSS 1.5%CVE-2025-34055CRITICALAVTECH IP camera, DVR, and NVR Devices Authenticated Root Command ExecutionEPSS 1.5%CVE-2019-1884HIGHCisco Web Security Appliance Web Proxy Denial of Service VulnerabilityEPSS 1.5%CVE-2019-16027HIGHCisco IOS XR Software Intermediate System–to–Intermediate System Denial of Service VulnerabilityEPSS 1.5%CVE-2026-41042CRITICALApache Gravitino: Unauthenticated callers can supply a malicious H2 JDBC URL through the testConnection API, which executes arbitrary Java code on the server via H2's INIT parameterEPSS 1.5%CVE-2019-7617—When the Elastic APM agent for Python versions before 5.1.0 is run as a CGI script, there is a variable name clash flaw if a remote attackerEPSS 1.5%CVE-2022-36125HIGHInteger overflow when reading corrupted .avro file in Avro Rust SDKEPSS 1.5%