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CVE-2019-10744: Prototype Pollution in lodash

July 10, 2019 (updated August 12, 2025)

Versions of lodash before 4.17.12 are vulnerable to Prototype Pollution. The function defaultsDeep allows a malicious user to modify the prototype of Object via {constructor: {prototype: {...}}} causing the addition or modification of an existing property that will exist on all objects.

References

  • access.redhat.com/errata/RHSA-2019:3024
  • github.com/advisories/GHSA-jf85-cpcp-j695
  • github.com/lodash/lodash/pull/4336
  • github.com/rubysec/ruby-advisory-db/blob/master/gems/lodash-rails/CVE-2019-10744.yml
  • nvd.nist.gov/vuln/detail/CVE-2019-10744
  • security.netapp.com/advisory/ntap-20191004-0005
  • snyk.io/vuln/SNYK-JS-LODASH-450202
  • support.f5.com/csp/article/K47105354?utm_source=f5support&amp%3Butm_medium=RSS
  • support.f5.com/csp/article/K47105354?utm_source=f5support&utm_medium=RSS
  • www.oracle.com/security-alerts/cpujan2021.html
  • www.oracle.com/security-alerts/cpuoct2020.html

Code Behaviors & Features

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Affected versions

All versions before 4.17.12

Fixed versions

  • 4.17.12

Solution

Upgrade to version 4.17.12 or above.

Impact 9.1 CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
  • CWE-20: Improper Input Validation

Source file

npm/lodash/CVE-2019-10744.yml

Spotted a mistake? Edit the file on GitLab.

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