CVE-2026-57436

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::Document#root= validated only that the new root was a Nokogiri::XML::Node, allowing a DTD node to be set as the document root. The result is a heap use-after-free during garbage collection or finalization, leading to an invalid memory read or potentially a segfault. This vulnerability is fixed in 1.19.4.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wjv4-x9w8-wm3h	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:ruby:*:*

History

26 Jun 2026, 16:47

Type	Values Removed	Values Added
First Time		Nokogiri Nokogiri nokogiri
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.3
CPE		cpe:2.3:a:nokogiri:nokogiri::::::ruby::*
References	~~() https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wjv4-x9w8-wm3h -~~	() https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-wjv4-x9w8-wm3h - Mitigation, Vendor Advisory

25 Jun 2026, 15:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-25 15:16

Updated : 2026-06-26 16:47

NVD link : CVE-2026-57436

Mitre link : CVE-2026-57436

CVE.ORG link : CVE-2026-57436

JSON object : View

Products Affected

nokogiri

nokogiri

CWE

CWE-416

Use After Free

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