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CVE-2026-57234— Nokogiri: XML::Schema on JRuby allows network requests when NONET is set, bypassing CVE-2020-26247

Quick assessment

Affected
sparklemotion nokogiri
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Sparkle Motion Nokogiri是Sparkle Motion个人开发者的一个HTML、XML和SAX解析库。 Sparkle Motion Nokogiri 1.19.4之前版本存在输入验证错误漏洞，该漏洞源于NONET解析选项在JRuby实现中未正确强制执行，可能导致通过默认选项解析的schema仍能获取外部资源，从而引发SSRF或XXE攻击。

CVSS 2.6 · Low EPSS 0.20% · P9

Affected Version Matrix 1

VendorProduct Version RangeStatus
sparklemotion nokogiri < 1.19.4 affected
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I. Basic Information for CVE-2026-57234

Vulnerability Information
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Vulnerability Title
Nokogiri: XML::Schema on JRuby allows network requests when NONET is set, bypassing CVE-2020-26247
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
大小写敏感处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Sparkle Motion Nokogiri 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sparkle Motion Nokogiri是Sparkle Motion个人开发者的一个HTML、XML和SAX解析库。 Sparkle Motion Nokogiri 1.19.4之前版本存在输入验证错误漏洞，该漏洞源于NONET解析选项在JRuby实现中未正确强制执行，可能导致通过默认选项解析的schema仍能获取外部资源，从而引发SSRF或XXE攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sparklemotion nokogiri < 1.19.4 -

II. Public POCs for CVE-2026-57234

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III. Intelligence Information for CVE-2026-57234

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Vendor Advisories for CVE-2026-57234 (1)

Same Patch Batch · sparklemotion · 2026-06-25 · 8 CVEs total

CVE-2026-57438 Nokogiri: Possible Use-After-Free in XInclude Processing
CVE-2026-57236 Nokogiri: Possible Use-After-Free when `Nokogiri::XML::Document#encoding=` raises an excep
CVE-2026-57437 Nokogiri: Possible Use-After-Free when directly using `NokogirI::XML::XPathContext` beyond
CVE-2026-57235 Nokogiri: Possible Out-of-Bounds Read in `Nokogiri::XML::NodeSet#[]`
CVE-2026-57436 Nokogiri: Possible Use-After-Free when setting `Document#root=` to an invalid node type
CVE-2026-57435 Nokogiri: Possible Use-After-Free when setting an attribute value via `Nokogiri::XML::Attr
CVE-2026-57434 Nokogiri: Null Pointer Dereference calling methods on uninitialized wrapper classes

IV. Related Vulnerabilities

Same product: nokogiri
Same vendor: sparklemotion
Same weakness: CWE-178

V. Comments for CVE-2026-57234

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