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-2026-24407HIGHiccDEV has Undefined Behavior in icSigCalcOp()EPSS 0.5%CVE-2026-24404HIGHiccDEV has Null Pointer Deference and Undefined Behavior in CIccXmlArrayType()EPSS 0.5%CVE-2026-55973HIGH'dns-error-reporting: yes' leads to stack buffer overflowEPSS 0.5%CVE-2026-48110HIGHRussh: SSH message fields were decoded through allocation-first parsers before field-specific boundsEPSS 0.5%CVE-2025-55679MEDIUMWindows Kernel Information Disclosure VulnerabilityEPSS 0.5%CVE-2026-51606HIGHAn improper input handling vulnerability in the RTSP service of Tenda CP3 V3.0 (firmware V31.1.9.91) causes the device to abruptly terminateEPSS 0.5%CVE-2026-47219HIGHfind-my-way is Vulnerable to DDoS with HTTP2EPSS 0.5%CVE-2026-30064HIGHImproper input validation in the buildFilter function (processor/processor.go) of free5gc v4.0.1 allows attackers to cause a Denial of ServiEPSS 0.5%CVE-2026-42544HIGHGranian: Unauthenticated DoS via WebSocket subprotocol header panicEPSS 0.5%CVE-2026-67978HIGHAn issue in the SBN UDP interface of NASA cFS v7.0.1 allows attackers to cause a Denial of Service (DoS) via transmitting a crafted SBN framEPSS 0.5%CVE-2026-30058HIGHImproper Input Validation in the HTTPModifySubscription handler of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via a EPSS 0.5%CVE-2026-45291HIGHCloudburst Network erroneously handles invalid connectionsEPSS 0.5%CVE-2026-82003HIGHAdobe Campaign Classic (ACC) | Improper Input Validation (CWE-20)EPSS 0.5%CVE-2026-30068HIGHImproper input validation in the HandleUpdate function (/sbi/parameter_provision.go) of free5gc v4.0.1 allows attackers to cause a Denial ofEPSS 0.5%CVE-2026-46679HIGHlibp2p: Memory DoS via subscription flood of unique topicsEPSS 0.5%CVE-2024-27613HIGHNumbas editor before 7.3 mishandles reading of themes and extensions.EPSS 0.5%CVE-2020-12521MEDIUMPhoenix Contact PLCnext Control Devices versions before 2021.0 LTS: A specially crafted LLDP packet may lead to a high system load in the PROFINET stack.EPSS 0.5%CVE-2023-21767HIGHWindows Overlay Filter Elevation of Privilege VulnerabilityEPSS 0.5%CVE-2026-50553HIGHNote Mark: Path traversal via unsanitized book/note slug in migrate export (sibling of GHSA-g49p)EPSS 0.5%CVE-2023-21558HIGHWindows Error Reporting Service Elevation of Privilege VulnerabilityEPSS 0.5%