CVE-2019-1010266: Lodash Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-x5rq-j2xg-h7qm
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CVSS 6.5
CWE-400
Published
Advisory Summary

CVE-2019-1010266 is a MODERATE (CVSS 6.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Lodash libraries in the npm ecosystem. The issue involves regular expression denial of service (redos) in lodash. Remediation is available by upgrading affected packages to version 4.17.11.

CVE-2019-1010266 at a Glance

CVE Identifier CVE-2019-1010266
GHSA Identifier GHSA-x5rq-j2xg-h7qm
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Lodash
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2019-1010266

To remediate this vulnerability, upgrade all affected Lodash dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

lodash fixed: 4.17.11 
npm install lodash@4.17.11
lodash-es fixed: 4.17.11 
npm install lodash-es@4.17.11
lodash-amd fixed: 4.17.11 
npm install lodash-amd@4.17.11
lodash-rails fixed: 4.17.11 
Upgrade lodash-rails to 4.17.11
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls lodash

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2019-1010266, inspect your project dependencies using npm:

npm ls lodash

Analyze the terminal output to locate any version of Lodash in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.17.11), your application is affected.

Note: The npm ls lodash command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Lodash, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

lodash prior to 4.7.11 is affected by: CWE-400: Uncontrolled Resource Consumption. The impact is: Denial of service. The component is: Date handler. The attack vector is: Attacker provides very long strings, which the library attempts to match using a regular expression. The fixed version is: 4.7.11.

CVE-2019-1010266 Affected Lodash Versions

4 component(s)
Fixed Versions:
4.17.11
Product / Package Ecosystem Affected Versions Fixed Version
lodash
npm/lodash
npm
≥ 4.7.0
< 4.17.11
4.17.11
lodash-es
npm/lodash-es
npm
≥ 4.7.0
< 4.17.11
4.17.11
lodash-amd
npm/lodash-amd
npm
≥ 4.7.0
< 4.17.11
4.17.11
lodash-rails
gem/lodash-rails
RubyGems
≥ 4.7.0
< 4.17.11
4.17.11

References

NVD — CVE-2019-1010266 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-1010266
Lodash Source Repository REPOSITORY
https://github.com/lodash/lodash/issues/3359
Lodash Source Repository REPOSITORY
https://github.com/github/advisory-database/pull/6138
Security Fix Commit FIX COMMIT
https://github.com/lodash/lodash/commit/5c08f18d365b64063bfbfa686cbb97cdd6267347
Lodash Source Repository REPOSITORY
https://github.com/lodash/lodash
GitHub Advisory / Wiki ADVISORY
https://github.com/lodash/lodash/wiki/Changelog
Lodash Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/lodash-rails/CVE-2019-1010266.yml
Lodash Security Information SECURITY
https://security.netapp.com/advisory/ntap-20190919-0004
snyk.io/vuln/snyk-js-lodash... WEB
https://snyk.io/vuln/SNYK-JS-LODASH-73639

Frequently Asked Questions

What is CVE-2019-1010266?
CVE-2019-1010266 is a security vulnerability in Lodash involving Regular Expression Denial of Service (ReDoS) in lodash under CWE-400: Uncontrolled Resource Consumption.
Which Lodash versions are affected?
Affected versions include releases prior to 4.17.11 across affected packages: lodash, lodash-es, lodash-amd, lodash-rails.
What version fixes CVE-2019-1010266?
Upgrading to 4.17.11 (or the latest patched release for your respective branch) resolves the vulnerability.
Is lodash affected?
Yes, lodash is affected in releases prior to 4.17.11. Upgrade your dependency to 4.17.11 or later.
Is lodash-es affected?
Yes, lodash-es is affected in releases prior to 4.17.11. Upgrade your dependency to 4.17.11 or later.
What is the CVSS score of CVE-2019-1010266?
CVE-2019-1010266 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2019-1010266?
CVE-2019-1010266 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check npm dependencies for CVE-2019-1010266?
Run the dependency tree command: 'npm ls lodash'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-x5rq-j2xg-h7qm",
  "modified" : "2025-09-29T20:19:28Z",
  "published" : "2019-07-19T16:13:07Z",
  "aliases" : [ "CVE-2019-1010266" ],
  "summary" : "Regular Expression Denial of Service (ReDoS) in lodash",
  "details" : "lodash prior to 4.7.11 is affected by: CWE-400: Uncontrolled Resource Consumption. The impact is: Denial of service. The component is: Date handler. The attack vector is: Attacker provides very long strings, which the library attempts to match using a regular expression. The fixed version is: 4.7.11.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
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    },
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        "introduced" : "4.7.0"
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    } ]
  }, {
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    } ]
  }, {
    "package" : {
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      "name" : "lodash-amd"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
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      }, {
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    } ]
  }, {
    "package" : {
      "ecosystem" : "RubyGems",
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    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
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  }, {
    "type" : "WEB",
    "url" : "https://github.com/lodash/lodash/issues/3359"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/github/advisory-database/pull/6138"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/lodash/lodash/commit/5c08f18d365b64063bfbfa686cbb97cdd6267347"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/lodash/lodash"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/lodash/lodash/wiki/Changelog"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/lodash-rails/CVE-2019-1010266.yml"
  }, {
    "type" : "WEB",
    "url" : "https://security.netapp.com/advisory/ntap-20190919-0004"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-LODASH-73639"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2019-07-19T16:11:26Z",
    "nvd_published_at" : null
  }
}