VYPR

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

VariantIncomplete

Description

The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.

Hierarchy (View 1000)

Parents

Children

none

Related attack patterns (CAPEC)

CAPEC-1 · CAPEC-180 · CAPEC-77

CVEs mapped to this weakness (612)

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  • CVE-2022-24802HigApr 1, 2022
    risk 0.46cvss 8.1epss 0.02

    deepmerge-ts is a typescript library providing functionality to deep merging of javascript objects. deepmerge-ts is vulnerable to Prototype Pollution via file deepmerge.ts, function defaultMergeRecords(). This issue has been patched in version 4.0.2. There are no known…

  • CVE-2022-23624HigFeb 7, 2022
    risk 0.46cvss 8.1epss 0.01

    Frourio-express is a minimal full stack framework, for TypeScript. Frourio-express users who uses frourio-express version prior to v0.26.0 and integration with class-validator through `validators/` folder are subject to a input validation vulnerability. Validators do not work…

  • CVE-2022-23623HigFeb 7, 2022
    risk 0.46cvss 8.1epss 0.01

    Frourio is a full stack framework, for TypeScript. Frourio users who uses frourio version prior to v0.26.0 and integration with class-validator through `validators/` folder are subject to a input validation vulnerability. Validators do not work properly for request bodies and…

  • CVE-2021-23470HigFeb 4, 2022
    risk 0.46cvss 8.2epss 0.01

    This affects the package putil-merge before 3.8.0. The merge() function does not check the values passed into the argument. An attacker can supply a malicious value by adjusting the value to include the constructor property. Note: This vulnerability derives from an incomplete…

  • CVE-2020-7774HigNov 17, 2020
    risk 0.46cvss 7.3epss 0.69

    The package y18n before 3.2.2, 4.0.1 and 5.0.5, is vulnerable to Prototype Pollution.

  • CVE-2026-41238MedApr 23, 2026
    risk 0.45cvss 6.9epss 0.00

    DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through 3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses `DOMPurify.sanitize()` with the default configuration (no `CUSTOM_ELEMENT_HANDLING`…

  • CVE-2026-27212HigFeb 21, 2026
    risk 0.44cvss 7.8epss 0.00

    Swiper is a free and mobile touch slider with hardware accelerated transitions and native behavior. Versions 6.5.1 through 12.1.1 have a Prototype pollution vulnerability. The vulnerability resides in line 94 of shared/utils.mjs, where the indexOf() function is used to check…

  • CVE-2025-57820HigAug 26, 2025
    risk 0.44cvss epss 0.00

    Svelte devalue is a utility library. Prior to version 5.3.2, a string passed to devalue.parse could represent an object with a __proto__ property and devalue.parse does not check that an index is numeric. This could result in assigning prototypes to objects and properties,…

  • CVE-2024-34148MedMay 2, 2024
    risk 0.44cvss 6.8epss 0.01

    Jenkins Subversion Partial Release Manager Plugin 1.0.1 and earlier programmatically disables the fix for CVE-2016-3721 whenever a build is triggered from a release tag, by setting the Java system property 'hudson.model.ParametersAction.keepUndefinedParameters'.

  • CVE-2021-43138HigApr 6, 2022
    risk 0.44cvss 7.8epss 0.03

    In Async before 2.6.4 and 3.x before 3.2.2, a malicious user can obtain privileges via the mapValues() method, aka lib/internal/iterator.js createObjectIterator prototype pollution.

  • CVE-2022-24999HigNov 26, 2022
    risk 0.43cvss 7.5epss 0.15

    qs before 6.10.3, as used in Express before 4.17.3 and other products, allows attackers to cause a Node process hang for an Express application because an __ proto__ key can be used. In many typical Express use cases, an unauthenticated remote attacker can place the attack…

  • CVE-2020-5258HigMar 10, 2020
    risk 0.43cvss 7.7epss 0.04

    In affected versions of dojo (NPM package), the deepCopy method is vulnerable to Prototype Pollution. Prototype Pollution refers to the ability to inject properties into existing JavaScript language construct prototypes, such as objects. An attacker manipulates these attributes…

  • CVE-2019-11358MedApr 20, 2019
    risk 0.43cvss 6.1epss 0.87

    jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototype pollution. If an unsanitized source object contained an enumerable __proto__ property, it could extend the native Object.prototype.

  • CVE-2026-73088HigAug 11, 2026
    risk 0.42cvss 7.5epss 0.00

    Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted…

  • CVE-2026-14574MedAug 5, 2026
    risk 0.42cvss 6.5epss 0.00

    In Eclipse Theia versions 0.7.0 and up until including 1.73.1, the `PreferenceUtils.merge` function in `@theia/core` recursively merges preference values without rejecting prototype-related keys (`__proto__`, `constructor`, `prototype`). Because this function is invoked by…

  • CVE-2026-47219HigJul 28, 2026
    risk 0.42cvss 7.5epss 0.00

    find-my-way is a framework-independent HTTP router that internally uses a Radix Tree and supports route parameters and wildcards. Versions prior to 9.7.0 are vulnerable to remotely triggerable DoS in find-my-way when it is used with Node's HTTP/2 server. The lookup() function…

  • CVE-2026-54306MedJun 23, 2026
    risk 0.42cvss 6.4epss 0.00

    n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, a prototype pollution vulnerability allowed a crafted public webhook payload to inject attacker-controlled fields into workflow data during internal object copying. These fields could be surfaced and…

  • CVE-2026-46625HigJun 10, 2026
    risk 0.42cvss 7.5epss 0.01

    JavaScript Cookie is a JavaScript API for handling cookies, client-side. Prior to version 3.0.7, js-cookie's internal assign() helper copies properties with for...in + plain assignment. When the source object is produced by JSON.parse, the JSON object's "__proto__" member is an…

  • CVE-2026-8161HigMay 12, 2026
    risk 0.42cvss 7.5epss 0.00

    [email protected] and lower versions are vulnerable to denial of service via uncaught exception. By sending a multipart/form-data request with a field name that collides with an inherited Object.prototype property such as __proto__, constructor, or toString, the parser invokes…

  • CVE-2026-35209HigApr 6, 2026
    risk 0.42cvss 7.5epss 0.00

    defu is software that allows uers to assign default properties recursively. Prior to version 6.1.5, applications that pass unsanitized user input (e.g. parsed JSON request bodies, database records, or config files from untrusted sources) as the first argument to `defu()` are…