Unchecked Return Value Affecting nokogiri package, versions >=1.5.1, <1.19.1
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Test your applications- Snyk IDSNYK-RUBY-NOKOGIRI-15315717
- published19 Feb 2026
- disclosed18 Feb 2026
- creditUnknown
Introduced: 18 Feb 2026
New CVE NOT AVAILABLE CWE-252 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade nokogiri to version 1.19.1 or higher.
Overview
nokogiri is a gem for parsing HTML, XML, SAX, and Reader.
Affected versions of this package are vulnerable to Unchecked Return Value from xmlC14NExecute, used in the canonicalize methods. These return and empty string rather than an error code for invalid and incomplete XML inputs. Although this behavior is not in itself a vulnerability in the parsing functionality, it has been demonstrated to be exploitable as a signature bypass in the vulnerability described in CVE-2025-66568.
Note: This is only exploitable in the CRuby extension. JRuby is not vulnerable.