GHSA-mrxw-mxhj-p664

Critical

GitHubnot-fixedPATCH AVAILABLENot Available

GHSA-mrxw-mxhj-p664

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Description

Summary

Nokogiri v1.18.4 upgrades its dependency libxslt to v1.1.43.

libxslt v1.1.43 resolves:

CVE-2025-24855: Fix use-after-free of XPath context node
CVE-2024-55549: Fix UAF related to excluded namespaces

Impact

CVE-2025-24855

"Use-after-free due to xsltEvalXPathStringNs leaking xpathCtxt->node"
MITRE has rated this 7.8 High CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H
Upstream report: https://gitlab.gnome.org/GNOME/libxslt/-/issues/128
NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2025-24855

CVE-2024-55549

"Use-after-free related to excluded result prefixes"
MITRE has rated this 7.8 High CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H
Upstream report: https://gitlab.gnome.org/GNOME/libxslt/-/issues/127
NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2024-55549

Summary

Nokogiri v1.18.4 upgrades its dependency libxslt to v1.1.43.

libxslt v1.1.43 resolves:

CVE-2025-24855: Fix use-after-free of XPath context node
CVE-2024-55549: Fix UAF related to excluded namespaces

Impact

CVE-2025-24855

"Use-after-free due to xsltEvalXPathStringNs leaking xpathCtxt->node"
MITRE has rated this 7.8 High CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H
Upstream report: https://gitlab.gnome.org/GNOME/libxslt/-/issues/128
NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2025-24855

CVE-2024-55549

"Use-after-free related to excluded result prefixes"
MITRE has rated this 7.8 High CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H
Upstream report: https://gitlab.gnome.org/GNOME/libxslt/-/issues/127
NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2024-55549

Impact Assessment

This critical vulnerability poses an immediate and severe threat to system security. Exploitation could lead to complete system compromise, data breach, or denial of service. Immediate action is required.

CVSS v3.1 Score

9.8

Quick Facts

PublishedJul 12, 2026

Last ModifiedJul 12, 2026

Discovered BySecurity Researcher

Statusnot-fixed

Attack Metrics

CVSS v3.1 Metrics Breakdown

attack Vector

attack Complexity

privileges Required

user Interaction

scope

Unchanged

confidentiality Impact

High

integrity Impact

High

availability Impact

High

Remediation Guide

How to Fix This Vulnerability

Remediation Steps

1Upgrade the package to version 1.18.4 or later
2Review and audit affected systems for potential exploitation
3Implement additional security controls if immediate patching is not possible
4Monitor for suspicious activity related to this vulnerability

Mitigation Strategies

Immediate Patching

Critical

Apply security patches to version 1.18.4 immediately

Network Segmentation

High

Isolate affected systems from untrusted networks until patching is complete

Monitoring and Detection

Medium

Implement enhanced monitoring for exploitation attempts and unusual behavior

Event History

Vulnerability Timeline

Vulnerability published

2026-07-12T10:20:26Z

published

Patches released: 1.18.4

2026-07-12T10:20:26Z

patched

▪ Common questions

How severe is GHSA-mrxw-mxhj-p664?

GHSA-mrxw-mxhj-p664 is rated CRITICAL with a CVSS score of 9.8.

How do I fix GHSA-mrxw-mxhj-p664?

Upgrade the affected package to 1.18.4.

Back to All Vulnerabilities

GHSA-mrxw-mxhj-p664

Critical

GitHubnot-fixedPATCH AVAILABLENot Available