Vulnerability · Published Jun 25, 2026 · Assigned by GitHub_M
CVE-2026-57234Nokogiri: XML::Schema on JRuby allows network requests when NONET is set, bypassing CVE-2020-26247
Low 2.6
In plain English
A low-severity XML external entity in nokogiri from sparklemotion. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, the NONET parse option, which Nokogiri turns on by default for Nokogiri::XML::Schema (see CVE-2020-26247), was not correctly enforced on the JRuby implementation. As a result, a schema parsed with default options could still cause external resources to be fetched over the network, potentially enabling SSRF or XXE attacks. This vulnerability is fixed in 1.19.4.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ruby-nokogiri | no fix listed | DEBIAN-CVE-2026-57234 |
| Debian:13 | ruby-nokogiri | no fix listed | DEBIAN-CVE-2026-57234 |
| Debian:14 | ruby-nokogiri | 1.19.4+dfsg-1 | DEBIAN-CVE-2026-57234 |
| RubyGems | nokogiri | 1.19.4 | GHSA-8678-w3jw-xfc2 |
| Ubuntu:24.04:LTS | ruby-nokogiri | no fix listed | UBUNTU-CVE-2026-57234 |
| Ubuntu:25.10 | ruby-nokogiri | no fix listed | UBUNTU-CVE-2026-57234 |
| Ubuntu:26.04:LTS | ruby-nokogiri | no fix listed | UBUNTU-CVE-2026-57234 |
| Ubuntu:26.10 | ruby-nokogiri | no fix listed | UBUNTU-CVE-2026-57234 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| sparklemotion | nokogiri | < 1.19.4 |
Weakness: CWE-178, CWE-184, CWE-611 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N