How severe is CVE-2019-11358?

CVE-2019-11358 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2019-11358?

CVE-2019-11358 affects the following packages: org.webjars.npm:jquery (Maven), jquery (npm), jQuery (NuGet), maximebf/debugbar (Packagist), django (PyPI), django (PyPI), jquery-rails (RubyGems). Ecosystems affected: Maven, npm, NuGet, Packagist, PyPI, RubyGems.

How do I fix CVE-2019-11358?

Update org.webjars.npm:jquery to 3.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-11358 is resolved across your whole dependency graph.

How do I detect CVE-2019-11358 in my Maven, npm, NuGet, Packagist, PyPI, RubyGems dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.webjars.npm:jquery, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2019-11358 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2019-11358 actively exploited in the wild?

Yes. There are 16 known exploit references for CVE-2019-11358, including 1 documented proof-of-concept exploit on Exploit-DB and 10 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2019-11358?

CVE-2019-11358 has an EPSS (Exploit Prediction Scoring System) score of 86.8%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

What type of vulnerability is CVE-2019-11358?

CVE-2019-11358 is classified as CWE-1321 (CWE-1321). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2019-11358 published, and has it been updated?

CVE-2019-11358 was published on April 20, 2019 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven📦 npm.NET NuGet🐘 Packagist🐍 PyPI

Not in CISA KEV

MEDIUM severity

CVE-2019-11358 — jquery

MEDIUMFix: jquery/jquery@753d591

CVE-2019-11358 is a medium-severity (CVSS 6.1) CWE-1321 vulnerability in org.webjars.npm:jquery. 16 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for org.webjars.npm:jquery — see the affected versions and patch details below.

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

Also known asDRUPAL-CORE-2019-006GHSA-6c3j-c64m-qhgqPYSEC-2026-628SNYK-JS-JQUERY-174006

Published

Apr 20, 2019

Updated

Oct 24, 2026

Affected

7 pkgs

Patched

7 / 7

Exploits

16 known

Exploitation data as of Oct 27, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2019-11358.

EPSS Exploitation Probability

via FIRST.org ↗

86.8%probability of exploitation in next 30 days

Very High Risk0.00%

Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

7 pkgs affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

22Kother npm packages depend on this — each one inherits the vulnerability until it's patched upstream

jquerynpm

11.7Mdownloads / week

Description

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.

Affected Packages

7 total 7 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.webjars.npm:jquery`	≥ 1.1.4&&< 3.4.0	3.4.0`org.webjars.npm:jquery:3.4.0`
📦npm	`jquery`	≥ 1.1.4&&< 3.4.0	3.4.0`npm install jquery@3.4.0`
.NETNuGet	`jQuery`	≥ 1.1.4&&< 3.4.0	3.4.0`dotnet add package jQuery --version 3.4.0`
🐘Packagist	`maximebf/debugbar`	all versions	1.19.0`composer require maximebf/debugbar:^1.19.0`
🐍PyPI	`django`	≥ 2.0a1&&< 2.1.9	2.1.9`pip install --upgrade 'django==2.1.9'`
🐍PyPI	`django`	≥ 2.2a1&&< 2.2.2	2.2.2`pip install --upgrade 'django==2.2.2'`

Affected Products

105 products · 218 configurations

Application

backdropbackdropcms

≥ 1.12.0 && < 1.12.6

range

debian linuxdebian

3 versions

8.09.010.0

Application

drupaldrupal

≥ 8.6.0 && < 8.6.15

range

fedorafedoraproject

3 versions

282930

Application

joomla\!joomla

≥ 3.0.0 && ≤ 3.9.4

range

Application

jqueryjquery

< 3.4.0

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-52141webappsmultiple

jQuery 3.3.1 - Prototype Pollution & XSS Exploit

by xOryus · Apr 8, 2025

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.webjars.npm:jquery, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.webjars.npm:jquery to 3.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-11358 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Red Hat Virtualization 4.2 EUS contains the affected version of bootstrap in the packages ovirt-js-dependencies and ovirt-engine-dashboard. These packages are deprecated in Red Hat Virtualization 4.3.

Product	Fixed in	Advisory
CloudForms Management Engine 5.10	`ansible-tower-0:3.5.2-1.el7at`	RHSA-2019:2587
Red Hat Enterprise Linux 7	`ipa-0:4.6.8-5.el7`	RHSA-2020:3936
Red Hat Enterprise Linux 7	`pcs-0:0.9.169-3.el7_9.3`	RHSA-2022:7343
Red Hat Enterprise Linux 8	`idm:client-8030020200923172426.05ac3f11`	RHSA-2020:4670
Red Hat Enterprise Linux 8	`pki-core:10.6-8030020200911215836.5ff1562f`	RHSA-2020:4847
Red Hat Enterprise Linux 8	`pcs-0:0.10.10-4.el8`	RHSA-2021:4142
Red Hat JBoss Enterprise Application Platform 7.4.9	`org.jboss.hal/hal-console:3.3.16.Final-redhat-00001`	RHSA-2023:0556
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8	`eap7-hal-console-0:3.3.16-1.Final_redhat_00001.1.el8eap`	RHSA-2023:0553

UbuntuMEDIUM

USN-7622-1Ubuntu

Frequently Asked Questions

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`.

O3 Security · Impact-Aware SCA

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CVE-2019-11358 — jquery

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2019-11358 in your dependencies?