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CVE-2018-14404 — Vulnerability in nokogiri — CVE Details

HIGH

Nokogiri NULL Pointer Dereference

Published January 17, 2019Updated December 5, 2025Source: osv

Summary

A NULL pointer dereference vulnerability exists in the `xpath.c:xmlXPathCompOpEval()` function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the `XPATH_OP_AND` or `XPATH_OP_OR` case. Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable to a denial of service attack due to a crash of the application.

Advisory Timeline

  • First published January 17, 2019 (2825 days ago).
  • Last revised December 5, 2025 — 2514 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update nokogiri to 1.8.5 or later
gem install nokogiri -v 1.8.5

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
nokogiri
rubygems
1.0.0, 1.0.1, 1.0.2, 1.0.3 (+100 more)1.8.5

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-476
    NULL Pointer DereferenceMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

References

Frequently Asked Questions

What is CVE-2018-14404?
Nokogiri NULL Pointer Dereference This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2018-14404?
CVE-2018-14404 affects nokogiri. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2018-14404 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-6qvp-r6r3-9p7h

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