CVE-2026-48819

Hey API: `buildClientParams` template: prototype chain substitution via unknown `$<slot>___proto__` key

Hey API is an ecosystem for turning API specifications into production-ready code. Prior to 0.97.3, dist/clients/core/params.ts ships a runtime template copied into generated SDKs as params.gen.ts, and buildClientParams writes unknown slot-prefixed keys such as $body_, $headers_, $path_, and $query_ directly to the corresponding slot, allowing $query___proto__ alongside a legitimate q field to set params.query through params["query"]["__proto__"] = value, call Object.setPrototypeOf(params.query, value), and expose inherited attacker-controlled keys during for..in iteration. This issue is fixed in version 0.97.3.

CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Hey-api

Products

Openapi-ts

CVE-2026-65913

DOMPurify before 3.3.2 Prototype Pollution via USE_PROFILES

DOMPurify before 3.3.2 contains a prototype pollution vulnerability in USE_PROFILES mode that allows attackers to bypass attribute filtering by polluting Array.prototype properties. Attackers can set Array.prototype properties like onclick to true, causing DOMPurify to accept event handlers as allowlisted attributes and resulting in DOM-based XSS when sanitized markup is rendered.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed

Vendors

Cure53

Products

Dompurify

CVE-2026-53592

FreeScout vulnerable to prototype pollution in getQueryParam

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. A Prototype Pollution condition in the `getQueryParam` function `/public/js/main.js` and was addressed in version 1.8.139 by blocking URL query keys matching the pattern `__proto__`. However, this mitigation is incomplete: it only filters top-level `__proto__` keys and fails to sanitize nested forms such as `b[__proto__][polluted]=PWNED`. As a result, an attacker-controlled URL query string can still write into `Object.prototype` on any page that loads `main.js`. Version 1.8.223 contains a updated fix.

CVSS 3.1 · 4.6 Medium EPSS < 1% KEV · Not listed

Vendors

Freescout Helpdesk

Products

Freescout

CVE-2026-54335

Feathersjs: Prototype pollution in @feathersjs/commons _.merge via JSON-parsed __proto__

Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. In 5.0.44 and earlier, the _.merge(target, source) utility exported by @feathersjs/commons recursively merges source into target by iterating Object.keys(source). When source was produced by JSON.parse and contains a __proto__, constructor, or prototype key, that key is returned as an own-enumerable property; the recursive merge then resolves target['__proto__'] to Object.prototype and writes attacker-supplied properties onto it, polluting the prototype for all plain objects in the process for the lifetime of the Node process. This issue is fixed in version 5.0.45.

CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed

Vendors

Feathersjs

Products

Feathers

CVE-2026-16150

RobinHerbots Inputmask Internal Deep Merge Helper extend.js extendAliases prototype pollution

A vulnerability was found in RobinHerbots Inputmask up to 5.0.9. Affected by this issue is the function extendDefaults/extendDefinitions/extendAliases in the library lib/dependencyLibs/extend.js of the component Internal Deep Merge Helper. The manipulation results in improperly controlled modification of object prototype attributes. The attack may be performed from remote. The project was informed of the problem early through an issue report but has not responded yet.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Robinherbots

Products

Inputmask

CVE-2026-16151

CartoDB carto-api-client filters.ts addFilter prototype pollution

A vulnerability has been found in CartoDB carto-api-client 0.5.29. This impacts the function addFilter of the file src/filters.ts. Such manipulation of the argument column leads to improperly controlled modification of object prototype attributes. The attack can be executed remotely. The project was informed of the problem early through an issue report but has not responded yet.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Cartodb

Products

Carto-api-client

CVE-2026-16008

sagold json-schema-library propertyDependencies.ts parsePropertyDependencies prototype pollution

A security vulnerability has been detected in sagold json-schema-library 11.5.0/11.5.1. This impacts the function parsePropertyDependencies of the file src/keywords/propertyDependencies.ts. The manipulation leads to improperly controlled modification of object prototype attributes. The attack can be initiated remotely. Upgrading to version 11.6.0 will fix this issue. The identifier of the patch is 432287ee6f68a02ce6f015354618486ec427a32d. It is advisable to upgrade the affected component.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Sagold

Products

Json-schema-library

CVE-2026-48795

Incomplete fix for CVE-2026-25754 in @adonisjs/bodyparser

AdonisJS is a TypeScript-first web framework. From 10.1.3 until 10.1.5 and 11.0.3, AdonisJS @adonisjs/bodyparser incompletely fixed CVE-2026-25754 because nested multipart field payloads such as user.__proto__.polluted and constructor.prototype still caused lodash _.set() via @poppinss/utils to create plain intermediate objects and pollute Object.prototype. This issue is fixed in versions 10.1.5 and 11.0.3.

CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Adonisjs

Products

Core

CVE-2026-15697

svgdotjs svg.js npm Package API EventTarget.on prototype pollution

A vulnerability was found in svgdotjs svg.js up to 3.2.5. This affects the function EventTarget.on of the file svgdotjs/svg.js of the component npm Package API. Performing a manipulation results in improperly controlled modification of object prototype attributes. The attack may be initiated remotely. The project was informed of the problem early through an issue report but has not responded yet.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Svgdotjs

Products

Svg.js

CVE-2026-15607

tanstack db Alias Path select.ts select prototype pollution

A vulnerability was detected in tanstack db up to 0.6.8. Affected by this vulnerability is the function select of the file src/query/compiler/select.ts of the component Alias Path Handler. The manipulation results in improperly controlled modification of object prototype attributes. The attack may be launched remotely. The exploit is now public and may be used. The patch is identified as ac09b1177a100eafa85cba3cd09dd1f53f933ded. A patch should be applied to remediate this issue.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Tanstack

Products

Db

CVE-2026-49459

DOMPurify: IN_PLACE mode preserves attributes of a clobbered root element, allowing XSS via attacker-controlled root DOM

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(root, { IN_PLACE: true }) could preserve event-handler attributes on an attacker-controlled <form> root when a descendant name clobbered properties checked by _isClobbered, because _forceRemove no-opped on the parent-less root and _sanitizeAttributes returned early. This issue is fixed in version 3.4.6.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed

Vendors

Cure53

Products

Dompurify

CVE-2026-15702

tamagui config.ts updateConfig prototype pollution

A security vulnerability has been detected in tamagui up to 2.3.0. This affects the function updateConfig of the file code/core/web/src/config.ts. Such manipulation leads to improperly controlled modification of object prototype attributes. The attack may be performed from remote. Upgrading to version 2.3.1 is able to mitigate this issue. The name of the patch is e46af9879b7627934ea4d6d6e46e65cea53abb3d. The affected component should be upgraded.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Tamagui

Products

Tamagui

CVE-2026-15698

kofrasa mingo Update API updateMany prototype pollution

A vulnerability was determined in kofrasa mingo up to 7.2.1. This impacts the function update/updateOne/updateMany of the component Update API. Executing a manipulation of the argument Set can lead to improperly controlled modification of object prototype attributes. The attack may be launched remotely. Upgrading to version 7.2.2 will fix this issue. This patch is called fadc398251792c2ba441cbc539f359fc7943c0c2. It is recommended to upgrade the affected component.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Kofrasa

Products

Mingo

CVE-2024-21529

dset: Prototype Pollution

Versions of the package dset before 3.1.4 are vulnerable to Prototype Pollution via the dset function due improper user input sanitization. This vulnerability allows the attacker to inject malicious object property using the built-in Object property __proto__, which is recursively assigned to all the objects in the program.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Dset Project

Products

Dset

CVE-2026-56763

Hono - Prototype Pollution via __proto__ Key in parseBody with dot Option

Hono before 4.12.7 allows __proto__ key in parseBody with dot option enabled, permitting specially crafted form field names to create objects with __proto__ properties. When parsed results are merged into regular JavaScript objects using unsafe merge patterns, attackers can exploit this to achieve prototype pollution and modify object behavior.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed

Vendors

Hono

Products

Hono

CVE-2026-15598

antv layout object.js setNestedValue prototype pollution

A weakness has been identified in antv layout 2.0.0. This impacts the function setNestedValue in the library lib/util/object.js. Executing a manipulation of the argument path can lead to improperly controlled modification of object prototype attributes. The attack can be launched remotely. The project was informed of the problem early through an issue report but has not responded yet.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Antv

Products

Layout

CVE-2026-15187

enquirer Public Package API Enquirer.set prototype pollution

A security flaw has been discovered in enquirer up to 2.4.1. Affected is the function Enquirer.set of the component Public Package API. The manipulation of the argument question.name results in improperly controlled modification of object prototype attributes. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Enquirer

Products

Enquirer

CVE-2026-59876

protobufjs: Text Format string map parsing can mutate returned map object prototype

protobufjs compiles protobuf definitions into JavaScript (JS) functions. From 8.2.0 until 8.6.5, the protobufjs Text Format extension parsed string-keyed map entries using ordinary property assignment, allowing a map entry with key __proto__ to change the prototype of the returned map object instead of creating an own map entry in protobufjs/ext/textformat. This issue is fixed in version 8.6.5.

CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Protobuf Protobufjs Project

Products

Protobuf Protobufjs

CVE-2026-59206

n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration

n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

N8n

Products

N8n

CVE-2026-57439

CyberChef: Prototype pollution in Series Chart operation

CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.2.0, the Series Chart operation accepts __proto__ as a key while parsing user-supplied CSV, allowing prototype pollution that can be chained with operations such as Parse UDP to inject malicious JavaScript into HTML output. This issue is fixed in version 11.2.0.

CVSS 3.1 · 5 Medium EPSS < 1% KEV · Not listed

Vendors

Gchq

Products

Cyberchef