CVE-2026-57434
Last modified
CVE-2026-57434 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri contains a bug when calling certain methods on allocated-but-uninitialized native wrapper classes that inherit from Nokogiri::XML::Node. EPSS estimates a 0.33% chance of exploitation in the next 30 days.
Description
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri contains a bug when calling certain methods on allocated-but-uninitialized native wrapper classes that inherit from Nokogiri::XML::Node. This caused a NULL pointer dereference that could crash the process. This vulnerability is fixed in 1.19.4.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nokogiri | Nokogiri | < 1.19.4 |
References
- https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-9cv2-cfxc-v4v2Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-57434?
How severe is CVE-2026-57434?
How do I fix CVE-2026-57434?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-57429Contributor Broken Access Control in Slim SEO <= 4.6.2 versi…6.5
- CVE-2026-5743The SimpLy Gallery Block & Lightbox plugin for WordPress is …6.4
- CVE-2026-57430Contributor Broken Access Control in SEOPress PRO <= 9.1.1 v…4.3
- CVE-2026-57431Author Cross Site Scripting (XSS) in Featured Image <= 2.1 v…6.5
- CVE-2026-57432Perl versions through 5.43.10 have an integer overflow in S_…8.4
- CVE-2026-57433Storable versions before 3.41 for Perl have a signed integer…9.8
- CVE-2026-57435Nokogiri is an open source XML and HTML library for the Ruby…7.5
- CVE-2026-57436Nokogiri is an open source XML and HTML library for the Ruby…5.3
- CVE-2026-57437Nokogiri is an open source XML and HTML library for the Ruby…5.3
- CVE-2026-57438Nokogiri is an open source XML and HTML library for the Ruby…6.6
- CVE-2026-57439CyberChef is a web app for encryption, encoding, compression…5
- CVE-2026-5745A flaw was found in libarchive. A NULL pointer dereference v…5.5
Are you affected by CVE-2026-57434?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST