NULL Pointer Dereference Affecting nokogiri package, versions [,1.19.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about NULL Pointer Dereference vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-UNMANAGED-NOKOGIRI-17391925
- published21 Jun 2026
- disclosed19 Jun 2026
- creditZheng Yu
Introduced: 19 Jun 2026
CVE-2026-57434 (opens in a new tab)How to fix?
Upgrade nokogiri to version 1.19.4 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference when certain methods are called on allocated-but-uninitialized native wrapper classes that inherit from Nokogiri::XML::Node. An attacker can cause the process to crash by invoking methods on objects created via direct calls to .allocate without proper initialization.
Note: This is only exploitable if application code directly calls .allocate on a native-backed class and then invokes methods on the resulting uninitialized object; it cannot be triggered by untrusted input or normal use of the public API.
Workaround
This vulnerability can be mitigated by avoiding direct calls to .allocate on native-backed classes and using documented constructors and factory methods instead.