CVE-2026-48795: AdonisJS bodyparser prototype pollution via nested multipart fields

CVE-2026-48795 · Severity: high · CVSS 8.6 · Published 2026-07-15

AdonisJS is a web development framework used to build server-side applications. A security flaw in its data processing component allows unauthenticated attackers to send specially crafted requests that interfere with the application's core memory. This can lead to service outages, bypasses of security controls, or potentially allow attackers to take control of the server.

Technologies: AdonisJS Bodyparser. Vendors: AdonisJS, npm.

Quick answers

Is CVE-2026-48795 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-48795 being exploited in the wild.
How severe is CVE-2026-48795?
High severity, with a CVSS score of 8.6, published 15 July 2026.
Which products and versions are affected?
AdonisJS Bodyparser >= 10.1.3 < 10.1.5, >= 11.0.0-next.9 < 11.0.3, >= 10.1.3, < 10.1.5; >= 11.0.0-next.9, < 11.0.3; @adonisjs/bodyparser (npm) SEMVER:introduced=10.1.3,fixed=10.1.5.
Is there a fix for CVE-2026-48795?
Yes. @adonisjs/bodyparser (npm): upgrade to 10.1.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-48795 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-48795?
Check whether you run AdonisJS Bodyparser or @adonisjs/bodyparser (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • @adonisjs/bodyparser (npm): upgrade to 10.1.5 or later
    npm install @adonisjs/bodyparser@10.1.5

Technical details

The vulnerability is a prototype pollution (CWE-1321) in the @adonisjs/bodyparser component of the AdonisJS framework. While a previous fix (CVE-2026-25754) used Object.create(null) to prevent direct prototype access, it failed to account for nested payloads. When processing multipart/form-data, the lodash _.set() function (via @poppinss/utils) creates plain intermediate objects for nested keys. An attacker can provide a payload like 'user.__proto__.polluted' to bypass the initial protection and modify Object.prototype. This is exploitable remotely without authentication on any route using the BodyParserMiddleware. The issue is resolved in versions 10.1.5 and 11.0.3.

Affected products

  • AdonisJS @adonisjs/bodyparser >= 10.1.3, < 10.1.5; >= 11.0.0-next.9, < 11.0.3

Identifiers

  • CVE-2026-48795
  • GHSA-qcm7-3vpr-hj5h

Timeline

  • 2026-05-22: patched: Fixes released in v10.1.5 and v11.0.3
  • 2026-05-28: advisory: GitHub Security Advisory GHSA-qcm7-3vpr-hj5h published
  • 2026-07-15: disclosed: CVE-2026-48795 published to NVD

References

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