CVE-2026-79771 MEDIUM

CVE-2026-79771: Nokogiri before 1.19.3 Memory Leak via XSLT Transform

Vendor Sparklemotion
Product nokogiri
Weakness CWE-401
Published August 25, 2026
Last update August 25, 2026

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 25, 2026 CVE published
August 25, 2026 Record updated