CVE-2026-48795

Deferred Deferred - Pending Action

Prototype Pollution in AdonisJS Bodyparser

Publication date: 2026-07-15

Last updated on: 2026-07-16

Assigner: GitHub, Inc.

Description

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 Scores

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Meta Information

Published

2026-07-15

Last Modified

2026-07-16

Generated

2026-08-05

AI Q&A

2026-07-16

EPSS Evaluated

2026-08-03

NVD

CVE-2026-48795

Affected Vendors & Products

Vendor	Product	Version / Range
adonisjs	bodyparser	From 10.1.3 (inc) to 10.1.5 (inc)
adonisjs	bodyparser	11.0.3

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-1321	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.

Attack-Flow Graph

Executive Summary

This vulnerability in AdonisJS affects the @adonisjs/bodyparser package versions between 10.1.3 and 10.1.5 and 11.0.3. It involves incomplete fixes for CVE-2026-25754 where nested multipart field payloads like user.__proto__.polluted or constructor.prototype still allow prototype pollution via lodash _.set() in @poppinss/utils. This creates plain intermediate objects that pollute Object.prototype.

Detection Guidance

To detect this vulnerability, check if your AdonisJS application uses affected versions of @adonisjs/bodyparser (10.1.3 to 10.1.5 or 11.0.0 to 11.0.2). Inspect package.json for the version. If vulnerable, update to 10.1.5 or 11.0.3 or later.

Impact Analysis

This vulnerability allows attackers to manipulate Object.prototype, potentially leading to prototype pollution attacks. This could cause unexpected behavior in applications, data corruption, or unauthorized access to sensitive information.

Compliance Impact

The vulnerability involves prototype pollution via nested multipart field payloads in AdonisJS, which could allow attackers to manipulate Object.prototype. This may lead to unauthorized data access or modification, potentially violating GDPR's data integrity and confidentiality requirements or HIPAA's safeguards for protected health information.

Mitigation Strategies

Upgrade AdonisJS @adonisjs/bodyparser to versions 10.1.5 or 11.0.3 or later to address the incomplete fix for CVE-2026-25754.

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