CVE-2025-71407
Nokogiri before 1.18.3 Stack Buffer Overflow and Use-After-Free
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-787 |
| Vendor | sparklemotion |
| Product | nokogiri |
| Published | Aug 25, 2026 |
| Last Updated | Aug 25, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
sparklemotion / nokogiri
0 < 1.18.3