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CVE-2015-8855: Regular Expression Denial of Service in semver

October 24, 2017 (updated March 3, 2026)

Versions 4.3.1 and earlier of semver are affected by a regular expression denial of service vulnerability when extremely long version strings are parsed.

References

  • github.com/advisories/GHSA-x6fg-f45m-jf5q
  • github.com/github/advisory-database/pull/7102
  • github.com/npm/node-semver
  • github.com/npm/node-semver/commit/5c4c9f6e26c7052a42b5ced2a7481c5c9b4363a0
  • github.com/npm/node-semver/commit/c80180d8341a8ada0236815c29a2be59864afd70
  • nvd.nist.gov/vuln/detail/CVE-2015-8855
  • www.npmjs.com/advisories/31
  • www.owasp.org/index.php/Regular_expression_Denial_of_Service_-_ReDoS

Code Behaviors & Features

Detect and mitigate CVE-2015-8855 with GitLab Dependency Scanning

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Affected versions

All versions starting from 1.0.4 before 4.3.2

Fixed versions

  • 4.3.2

Solution

Upgrade to version 4.3.2 or above.

Impact 7.5 HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Learn more about CVSS

Weakness

  • CWE-1333: Inefficient Regular Expression Complexity

Source file

npm/semver/CVE-2015-8855.yml

Spotted a mistake? Edit the file on GitLab.

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