Weaknesses of type CWE-20

5,429 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-2026-28936HIGHThe issue was addressed with improved checks. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 1EPSS 0.5%CVE-2022-35982MEDIUMSegfault in `SparseBincount` in TensorFlowEPSS 0.5%CVE-2026-48109HIGHMessagePack-CSharp: LZ4 decompression may fail with AccessViolationException after dereferencing memory from bad inputEPSS 0.5%CVE-2020-3538MEDIUMCisco Data Center Network Manager Path Traversal VulnerabilityEPSS 0.5%CVE-2025-5498MEDIUMslackero phpwcms Custom Source Tab cnt21.readform.inc.php is_file deserializationEPSS 0.5%CVE-2026-11736LOWStack-based buffer overflow vulnerability in some NETGEAR Nighthawk routersEPSS 0.5%CVE-2018-1047—A flaw was found in Wildfly 9.x. A path traversal vulnerability through the org.wildfly.extension.undertow.deployment.ServletResourceManagerEPSS 0.5%CVE-2026-94383HIGHMISP Blocklist Workflow Module: Arbitrary Script Execution via Unrestricted File ExtensionEPSS 0.5%CVE-2022-51010HIGHPocketMine-MP before 4.4.2 Server Crash via Item IDEPSS 0.5%CVE-2026-40162HIGHBugsink affected by authenticated arbitrary file write in artifactbundle/assembleEPSS 0.5%CVE-2022-51013HIGHPocketMine-MP before 4.2.3 Denial of Service via NBT MetadataEPSS 0.5%CVE-2026-95703MEDIUMMISP OrganisationsController File Existence and Image-Type Oracle via Forged Upload tmp_nameEPSS 0.5%CVE-2022-51012HIGHPocketMine-MP before 4.2.9 Denial of Service via NBT DeserializationEPSS 0.5%CVE-2026-82639HIGHNextChat 2.15.8 through 2.16.1 OpenAI API Key DisclosureEPSS 0.5%CVE-2020-3489HIGHCisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Service VulnerabilitiesEPSS 0.5%CVE-2019-12676HIGHCisco Adaptive Security Appliance Software and Firepower Threat Defense Software OSPF LSA Processing Denial of Service VulnerabilityEPSS 0.5%CVE-2020-3493HIGHCisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Service VulnerabilitiesEPSS 0.5%CVE-2020-3488HIGHCisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Service VulnerabilitiesEPSS 0.5%CVE-2023-27493HIGHEnvoy doesn't escape HTTP header valuesEPSS 0.5%CVE-2020-3497HIGHCisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Service VulnerabilitiesEPSS 0.5%