Nokogiri: Null Pointer Dereference calling methods on uninitialized wrapper classes
Priority LOW 16CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0046 40th percentileScored 2026-11-07
Fix Partial nokogiri (sparklemotion): 1.19.4Red Hat: 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| sparklemotion | nokogiri | before 1.19.4 | 1.19.4 | Patch available | CNA |
- nokogiri Vendorsparklemotion Affected before 1.19.4 Fixed in 1.19.4 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:ruby:*:* | before 1.19.4 | Vulnerable | sparklemotion |
- cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:ruby:*:* Versions before 1.19.4 Vulnerable ·sparklemotion
Remediation
- Fix · CNA nokogiri (sparklemotion) Fixed in 1.19.4
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat 3scale API Management Platform 2 | Affected | No fix yet: Fix deferred |
| Red Hat Satellite 6 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-57434
References
More sparklemotion Nokogiri vulnerabilities
- TI-2022-11724 Improper Handling of Unexpected Data Type in Nokogiri CVSS 3.1HIGH 8.2
- TI-2018-15259 zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if… CVSS 3.1HIGH 7.5
- TI-2019-03885 OS command injection in Nokogiri CVSS 3.1CRITICAL 9.8
- TI-2026-55247 Nokogiri before 1.19.3 ReDoS via CSS selector tokenizer CVSS 4.0HIGH 8.7
- TI-2022-07536 Unchecked return value from xmlTextReaderExpand in Nokogiri CVSS 3.1HIGH 7.5
- TI-2022-08648 Inefficient Regular Expression Complexity in Nokogiri CVSS 3.1HIGH 7.5
Sources
- CVE-2026-57434 · CVE Program
- CVE-2026-57434 · NVD
- FIRST EPSS
- CVE-2026-57434 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences