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Nokogiri: XML::Schema on JRuby allows network requests when NONET is set, bypassing CVE-2020-26247

sparklemotion nokogiri · CVE-2026-57234
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What is it?

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.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
2.6
EPSS
0.2%
First seen
2 d ago
Status
corroborated

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