VDB-373921 · CVE-2026-57438 · Nessus 323623

sparklemotion nokogiri up to 1.19.3 Nokogiri::XML::Node use after free

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.3	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in sparklemotion nokogiri up to 1.19.3. This impacts the function Nokogiri::XML::Node. This manipulation causes use after free. This vulnerability is handled as CVE-2026-57438. It is possible to launch the attack on the local host. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in sparklemotion nokogiri up to 1.19.3. It has been declared as critical. Affected by this vulnerability is the function Nokogiri::XML::Node. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, XInclude substitution performed by Nokogiri::XML::Node#do_xinclude replaced each in place, freeing the include node along with its children (such as and its descendants) and any namespaces declared on them. If an application had already exposed one of those nodes or namespaces to Ruby, the corresponding Ruby object was left pointing at freed memory. Using the object could result in invalid reads or writes to memory. This vulnerability is fixed in 1.19.4.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-57438 since 06/24/2026. The exploitation appears to be difficult. An attack has to be approached locally. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 323623 (Linux Distros Unpatched Vulnerability : CVE-2026-57438), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.19.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (323623). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

sparklemotion

Name

nokogiri

Version

Website

Product: https://github.com/sparklemotion/nokogiri/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.5
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 323623
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-57438

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: nokogiri 1.19.4

Timelineinfo

06/24/2026 CVE reserved
06/25/2026 +1 days Advisory disclosed
06/25/2026 +0 days VulDB entry created
06/29/2026 +4 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-57438 (🔒)
GCVE (CVE): GCVE-0-2026-57438
GCVE (VulDB): GCVE-100-373921

Entryinfo

Created: 06/25/2026 17:52
Updated: 06/29/2026 16:44
Changes: 06/25/2026 17:52 (68), 06/29/2026 16:44 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.