Bodyparser: CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in adonisjs core (CVE-2026-48795)
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.
AI Analysis
Technical Summary
The @adonisjs/bodyparser package suffered from an incomplete fix for CVE-2026-25754, resulting in a prototype pollution vulnerability exploitable through nested payloads in multipart/form-data requests. This vulnerability affects versions >=10.1.3 <10.1.5 and >=11.0.0-next.9 <11.0.3. An unauthenticated remote attacker can manipulate Object.prototype, potentially causing authorization bypass or other critical impacts. Official fixes are available in versions 10.1.5 and 11.0.3.
Potential Impact
Exploitation allows unauthenticated remote attackers to perform prototype pollution, which can lead to authorization bypass and other severe consequences impacting confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade to @adonisjs/bodyparser versions 10.1.5 or 11.0.3 or later, which contain the official fixes for this vulnerability. No other mitigations are specified.
Bodyparser: CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in adonisjs core (CVE-2026-48795)
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 v3.1
Score 8.6high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The @adonisjs/bodyparser package suffered from an incomplete fix for CVE-2026-25754, resulting in a prototype pollution vulnerability exploitable through nested payloads in multipart/form-data requests. This vulnerability affects versions >=10.1.3 <10.1.5 and >=11.0.0-next.9 <11.0.3. An unauthenticated remote attacker can manipulate Object.prototype, potentially causing authorization bypass or other critical impacts. Official fixes are available in versions 10.1.5 and 11.0.3.
Potential Impact
Exploitation allows unauthenticated remote attackers to perform prototype pollution, which can lead to authorization bypass and other severe consequences impacting confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade to @adonisjs/bodyparser versions 10.1.5 or 11.0.3 or later, which contain the official fixes for this vulnerability. No other mitigations are specified.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-qcm7-3vpr-hj5h
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-48795"]
- Ecosystems
- ["npm"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a4452e227e9c797198e1197
Added to database: 06/30/2026, 23:36:02 UTC
Last enriched: 07/16/2026, 07:55:33 UTC
Last updated: 07/19/2026, 05:57:15 UTC
Views: 63
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