CVE-2019-11358
jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototype pollution. If...
- Published
- Apr 19, 2019
- Updated
- Nov 15, 2024
- Assigning CNA
- mitre
- Evidence observed
- Apr 8, 2025
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NHigh · next 30 days
- Percentile
- 99.7%
- Model date
- Oct 19, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototype pollution. If an unsanitized source object contained an enumerable __proto__ property, it could extend the native Object.prototype.
Sources
A fix for CVE-2019-11358 (prototype pollution in jquery)
- https-nj.gov---CVE-2019-11358Informational
Vulnearability Report of the New Jersey official site
Proof-of-concept exploit for CVE-2019-11358, a prototype pollution vulnerability in jQuery's extend method (versions <3.4.0). Demonstrates the attack with a simple HTML/JS payload.
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