Nokogiri versions before 1.19.3 contain a memory leak in the XSLT Stylesheet transform method when processing Ruby strings containing null bytes. Attackers can exploit this by passing attacker-controlled input with null bytes to transform parameters, causing heap allocations to leak and enabling denial of service against long-running processes.
History

Tue, 01 Sep 2026 15:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:ruby:*:*

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 25 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 25 Aug 2026 17:45:00 +0000

Type Values Removed Values Added
First Time appeared Sparklemotion
Sparklemotion nokogiri
Vendors & Products Sparklemotion
Sparklemotion nokogiri

Tue, 25 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Description Nokogiri versions before 1.19.3 contain a memory leak in the XSLT Stylesheet transform method when processing Ruby strings containing null bytes. Attackers can exploit this by passing attacker-controlled input with null bytes to transform parameters, causing heap allocations to leak and enabling denial of service against long-running processes.
Title Nokogiri before 1.19.3 Memory Leak via XSLT Transform
First Time appeared Nokogiri
Nokogiri nokogiri
Weaknesses CWE-401
CPEs cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:*:*:*
Vendors & Products Nokogiri
Nokogiri nokogiri
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-08-25T15:16:03.736Z

Updated: 2026-08-25T17:44:08.629Z

Reserved: 2026-08-25T14:29:43.528Z

Link: CVE-2026-79771

cve-icon Vulnrichment

Updated: 2026-08-25T17:44:01.551Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-25T16:17:28.603

Modified: 2026-09-01T14:55:10.577

Link: CVE-2026-79771

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-25T15:16:03Z

Links: CVE-2026-79771 - Bugzilla