CVE-2026-8161
7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: ce714d77-add3-4f53-aff5-83d477b104bb (Secondary)
Description
multiparty@4.2.3 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 .push() on the inherited prototype value rather than an array, throwing a TypeError that propagates as an uncaught exception and crashes the process. Impact: any service accepting multipart uploads via multiparty is affected. Workarounds: none. Upgrade to multiparty@4.3.0 or higher.
Affected (1)
Products: Pillarjs: Multiparty
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| Before 4.3.0 |
Related CWEs
CWE-1321
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
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.
CWE-248
Uncaught Exception
An exception is thrown from a function, but it is not caught.
References (2)
Source: ce714d77-add3-4f53-aff5-83d477b104bb
Third Party Advisory
Source: ce714d77-add3-4f53-aff5-83d477b104bb
Vendor Advisory
Timeline
No history available yet.