Weaknesses of type CWE-1321

439 results

Poluição de Protótipo

É a capacidade de um atacante modificar o protótipo de objetos JavaScript (ou estruturas similares em outras linguagens), afetando todas as instâncias daquela classe. Isso ocorre quando o código não valida ou sanitiza chaves de entrada antes de atribuir propriedades a objetos, permitindo acesso a `__proto__`, `constructor.prototype` ou `prototype`. O risco é grave: dados sensíveis podem ser injetados globalmente, lógica de autenticação contornada, ou até código executado.

Example

Um servidor Node.js recebe um objeto JSON `{"name": "João", "__proto__": {"isAdmin": true}}` e o mescla ingenuamente em um objeto de usuário via `Object.assign(usuario, entrada)`. De repente, todos os novos objetos criados herdam `isAdmin: true`, elevando privilégios sem qualquer validação real.

How to mitigate

Nunca confie em chaves de entrada: valide e bloqueie explicitamente chaves perigosas como `__proto__`, `constructor`, `prototype` antes de atribuir. Use `Object.create(null)` para criar objetos sem protótipo herdado, ou bibliotecas seguras como `lodash.merge` com configurações defensivas. Em APIs REST, considere esquemas estritos (JSON Schema) que rejeitam propriedades inesperadas.

CVE-2023-26158HIGHAll versions of the package mockjs are vulnerable to Prototype Pollution via the Util.extend function due to missing check if the attribute EPSS 0.8%CVE-2026-42264HIGHAxios: Prototype pollution read-side gadgets in HTTP adapter allow credential injection and request hijackingEPSS 0.8%CVE-2026-25047CRITICALdeepHas vulnerable to Prototype Pollution via constructor.prototypeEPSS 0.8%CVE-2024-34148MEDIUMJenkins Subversion Partial Release Manager Plugin 1.0.1 and earlier programmatically disables the fix for CVE-2016-3721 whenever a build is EPSS 0.8%CVE-2024-24292CRITICALA Prototype Pollution issue in Aliconnect /sdk v.0.0.6 allows an attacker to execute arbitrary code via the aim function in the aim.js compoEPSS 0.8%CVE-2024-39013CRITICAL2o3t-utility v0.1.2 was discovered to contain a prototype pollution via the function extend. This vulnerability allows attackers to execute EPSS 0.8%CVE-2024-36580CRITICALA Prototype Pollution issue in cdr0 sg 1.0.10 allows an attacker to execute arbitrary code.EPSS 0.8%CVE-2024-22443HIGHA vulnerability in the web-based management interface of EdgeConnect SD-WAN Orchestrator could allow an authenticated remote attacker to conEPSS 0.8%CVE-2024-52810MEDIUMPrototype Pollution in @intlify/shared >=9.7.0 <= 10.0.4EPSS 0.8%CVE-2023-26102HIGHAll versions of the package rangy are vulnerable to Prototype Pollution when using the extend() function in file rangy-core.js.The function EPSS 0.8%CVE-2024-21529HIGHVersions of the package dset before 3.1.4 are vulnerable to Prototype Pollution via the dset function due improper user input sanitization. EPSS 0.8%CVE-2026-85625CRITICALsift 17.1.3 Prototype Pollution Remote Code Execution via $whereEPSS 0.7%CVE-2025-62381HIGHsveltekit-superforms Prototype Pollution in `parseFormData` function of `formData.js`EPSS 0.7%CVE-2023-32305HIGHaiven-extras PostgreSQL Privilege Escalation Through Overloaded Search PathEPSS 0.7%CVE-2024-32866HIGHConform contains Prototype Pollution Vulnerability in `parseWith...` functionEPSS 0.7%CVE-2022-42743MEDIUMdeep-parse-json 1.0.2 - Prototype PollutionEPSS 0.7%CVE-2022-41714MEDIUMfastest-json-copy 1.0.1 - Prototype PollutionEPSS 0.7%CVE-2025-5150MEDIUMdocarray Web API torch_dataset.py __getitem__ prototype pollutionEPSS 0.7%CVE-2026-25150CRITICALPrototype Pollution via FormData Processing in Qwik CityEPSS 0.7%CVE-2024-21505HIGHVersions of the package web3-utils before 4.2.1 are vulnerable to Prototype Pollution via the utility functions format and mergeDeep, due toEPSS 0.7%