CVE-2025-71407
CRITICAL
NVD
CVSS Score
9.8
Severity
CRITICAL
Published
Aug 25, 2026
Vendor
unknown
Description
Nokogiri before 1.18.3 contains a stack buffer overflow vulnerability in libxml2 when reporting DTD validation errors with long QName prefixes, and a use-after-free vulnerability during validation against untrusted XML Schemas. Attackers can trigger these vulnerabilities by providing malicious DTD content or untrusted XSD files to cause denial of service or potential code execution.