Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.5, on JRuby, applications that parse untrusted XML with DTDLOAD, DTDVALID, or NOENT can have the NONET restriction bypassed when an external DTD or entity uses a short-form IPv4 host or uses absolute paths resolved against a network URL. The resolver can treat these identifiers as local and send a network request, potentially enabling server-side request forgery. CRuby and default parse options are not affected. This issue is fixed in version 1.19.5.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-v995-44v6-5fqm JRuby: NONET is bypassed for external DTDs and entities when the systemId uses a short-form IPv4 host
Fixes

Solution

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Workaround

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History

Tue, 10 Nov 2026 20:15:00 +0000

Type Values Removed Values Added
Description Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.5, on JRuby, applications that parse untrusted XML with DTDLOAD, DTDVALID, or NOENT can have the NONET restriction bypassed when an external DTD or entity uses a short-form IPv4 host or uses absolute paths resolved against a network URL. The resolver can treat these identifiers as local and send a network request, potentially enabling server-side request forgery. CRuby and default parse options are not affected. This issue is fixed in version 1.19.5.
Title Nokogiri : Possible SSRF on JRuby when resolving external DTDs or entities with `NONET` set
Weaknesses CWE-611
CWE-918
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-11-10T20:11:46.316Z

Reserved: 2026-11-10T17:07:43.283Z

Link: CVE-2026-126062

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-10T20:19:10.030

Modified: 2026-11-10T20:19:10.030

Link: CVE-2026-126062

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses