CVSS 4.0
2.0 lowCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NCVE-2026-126064 sparklemotion nokogiri: Use After Free
Low (2.0) in sparklemotion nokogiri. EPSS 0.2% estimated probability of exploitation activity in the next 30 days. Fixed in nokogiri 1.19.5.
On this page
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.5, the CRuby native extension can leave Ruby wrappers pointing to freed memory when Nokogiri::XML::Node#[]= or Nokogiri::XML::Node#lang= replaces an existing attribute value after code has accessed the attribute's child nodes. Replacing the value frees native child nodes while their wrappers remain reachable, and later use of those wrappers can cause an invalid read or process segfault. JRuby is not affected. This issue is fixed in version 1.19.5.
Severity
- EPSS
- 0.2% estimated probability of exploitation activity in the next 30 days; 5th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-416 Use After Free
- Published
- Modified
- Assigned by
- GitHub_M (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| sparklemotion nokogiri | < 1.19.5 |
Fix and patched versions
nokogiri(RubyGems): fixed in 1.19.5
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-3w22-6jfg-527w | RubyGems | nokogiri | <1.19.5 | 1.19.5 |
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12, 13, 14 | ruby-nokogiri | no fix listed | DEBIAN-CVE-2026-126064 |
| Ubuntu | 16.04:LTS, 18.04:LTS, 24.04:LTS and 5 more | ruby-nokogiri | no fix listed | UBUNTU-CVE-2026-126064 |
| Azure Linux | 3 | rubygem-nokogiri | no fix listed | AZL-113338 |
From the distributions' data via OSV.dev: the Debian Security Tracker; Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0; Microsoft's Azure Linux vulnerability data, MIT. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian · Ubuntu.
References
- https://github.com/sparklemotion/nokogiri/commit/b15b518db9fd15fd6b046f73d1439c282e5cc425
- https://github.com/sparklemotion/nokogiri/commit/feaed3c8c9bd9d81d064d4ca09b16044cd705d6f
- https://github.com/sparklemotion/nokogiri/pull/3752
- https://github.com/sparklemotion/nokogiri/releases/tag/v1.19.5
- https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-3w22-6jfg-527w