Stack-based Buffer Overflow Affecting nokogiri package, versions <1.18.9
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 applications- Snyk IDSNYK-RUBY-NOKOGIRI-10674176
- published10 Jul 2025
- disclosed12 Jun 2025
- creditAhmed Lekssays
Introduced: 12 Jun 2025
CVE-2025-6021 (opens in a new tab)How to fix?
Upgrade nokogiri to version 1.18.9 or higher.
Overview
nokogiri is a gem for parsing HTML, XML, SAX, and Reader.
Affected versions of this package are vulnerable to Stack-based Buffer Overflow via the xmlBuildQName function. An attacker can cause a crash and denial of service by supplying specially crafted XML input that triggers an integer overflow and subsequent stack buffer overflow.