MediumGHSA-6c3j-c64m-qhgqCVE-2019-11358DRUPAL-CORE-2019-006PYSEC-2026-628SNYK-JS-JQUERY-174006

XSS in jQuery as used in Drupal, Backdrop CMS, and other products

Published 26 Apr 2019 · Updated 8 Jul 2026

Affected packages

jquerynpm

Affected: >=1.1.4 <3.4.0
Fixed in: 3.4.0

Update to the fixed version for your release line, for example:npm install jquery@3.4.0

maximebf/debugbarComposer

Affected: <1.19.0
Fixed in: 1.19.0

Update to the fixed version for your release line, for example:composer require maximebf/debugbar:^1.19.0

Details

jQuery from 1.1.4 until 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.

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.