Prototype pollution in jQuery

Published: 2019-03-28 | Updated: 2019-04-22
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-11358
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Web applications / JS libraries

Vendor The jQuery Team

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

UPDATED: 11.04.2019
Changed patch status to patched.
UPDATED: 22.04.2019
Assigned CVE-ID to the advisory.

1) Prototype pollution

EUVDB-ID: #VU18092

Risk: Low


CVE-ID: CVE-2019-11358


Exploit availability:


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to prototype pollution. A remote attacker can trick the extend function can into modifying the prototype of Object when the attacker controls part of the structure passed to this function. This can let an attacker add or modify an existing property that will then exist on all objects and perform a denial of service (DoS) attack.


Update to version 3.4.0.

Vulnerable software versions

jQuery: 1.0.0 - 3.3.1

Fixed software versions

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?