Nokogiri : Possible SSRF on JRuby when resolving external DTDs or entities with `NONET` set

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-126062
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-10 20:19:10 UTC
Updated2026-11-10 20:19:10 UTC
DescriptionNokogiri 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.

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem Types: CWE-611 | CWE-918 | CWE-611 CWE-611: Improper Restriction of XML External Entity Reference | CWE-918 CWE-918: Server-Side Request Forgery

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Sparklemotion Nokogiri affected < 1.19.5 Not specified

References

ReferenceSourceLinkTags
github.com/sparklemotion/nokogiri/security/advisories/GHSA-v995-44v6-5fqm [email protected] github.com
github.com/sparklemotion/nokogiri/commit/e448ca2827a9198644610fb730259e1... [email protected] github.com
github.com/sparklemotion/nokogiri/releases/tag/v1.19.5 [email protected] github.com
github.com/sparklemotion/nokogiri/commit/97f41b65f4ee0cac859b87f0b26d264... [email protected] github.com
github.com/sparklemotion/nokogiri/pull/3752 [email protected] github.com
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