HOMEVULNERABILITIESCVE-2019-11358
MEDIUMPOC

CVE-2019-11358

CWE-1321Published: April 20, 2019· Updated: Jun 17, 2026

6.1
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2019-11358 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

A proof-of-concept (PoC) exploit exists for CVE-2019-11358. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeChanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected Vendors & Products

backdropcms1 product(s)
backdrop
Debian1 product(s)
debian linux
Drupal1 product(s)
drupal
Fedora1 product(s)
fedora
Joomla1 product(s)
joomla\!
jquery1 product(s)
jquery
Juniper Networks1 product(s)
junos
netapp2 product(s)
oncommand system managersnapcenter
openSUSE2 product(s)
backports sleleap
Oracle92 product(s)
agile product lifecycle management for processapplication expressapplication service level managementapplication testing suitebanking digital experiencebanking enterprise collectionsbanking platformbi publisherbig data discoverybusiness process management suitecommunications analyticscommunications application session controller+80
Red Hat2 product(s)
cloudformsvirtualization manager
Source: NVD CPE · 211 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

All References (146)

Quick Facts

CVE IDCVE-2019-11358
CVSS Score6.1 / 10
SeverityMEDIUM
WeaknessCWE-1321
CISA KEVNo
ExploitPOC
Affected11 vendor(s)
PublishedApr 20, 2019

Related CVEs (CWE-1321)

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2019-11358 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.