# CVE-2026-126062: Nokogiri : Possible SSRF on JRuby when resolving external DTDs or entities with `NONET` set

Status: published. Published: 2026-11-10. Updated: 2026-11-12.

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.

## Remediation

- fix: nokogiri (RubyGems): OSV reports a fixed version 1.19.5. Check the advisory for supported release branches. (source: OSV GHSA-v995-44v6-5fqm) — https://github.com/advisories/GHSA-v995-44v6-5fqm

## Affected products and versions

- sparklemotion / nokogiri: < 1.19.5 (affected). Source: CNA: GitHub_M
-  / nokogiri (nokogiri): 1.0.0 (affected, RubyGems); 1.0.1 (affected, RubyGems); 1.0.2 (affected, RubyGems); 1.0.3 (affected, RubyGems); 1.0.4 (affected, RubyGems); 1.0.5 (affected, RubyGems); 1.0.6 (affected, RubyGems); 1.0.7 (affected, RubyGems); 1.1.0 (affected, RubyGems); 1.1.1 (affected, RubyGems); 1.10.0 (affected, RubyGems); 1.10.0.rc1 (affected, RubyGems); 1.10.1 (affected, RubyGems); 1.10.10 (affected, RubyGems); 1.10.2 (affected, RubyGems); 1.10.3 (affected, RubyGems); 1.10.4 (affected, RubyGems); 1.10.5 (affected, RubyGems); 1.10.6 (affected, RubyGems); 1.10.7 (affected, RubyGems); 1.10.8 (affected, RubyGems); 1.10.9 (affected, RubyGems); 1.11.0 (affected, RubyGems); 1.11.0.rc1 (affected, RubyGems); 1.11.0.rc2 (affected, RubyGems); 1.11.0.rc3 (affected, RubyGems); 1.11.0.rc4 (affected, RubyGems); 1.11.1 (affected, RubyGems); 1.11.2 (affected, RubyGems); 1.11.3 (affected, RubyGems); 1.11.4 (affected, RubyGems); 1.11.5 (affected, RubyGems); 1.11.6 (affected, RubyGems); 1.11.7 (affected, RubyGems); 1.12.0 (affected, RubyGems); 1.12.0.rc1 (affected, RubyGems); 1.12.1 (affected, RubyGems); 1.12.2 (affected, RubyGems); 1.12.3 (affected, RubyGems); 1.12.4 (affected, RubyGems); 1.12.5 (affected, RubyGems); 1.13.0 (affected, RubyGems); 1.13.1 (affected, RubyGems); 1.13.10 (affected, RubyGems); 1.13.2 (affected, RubyGems); 1.13.3 (affected, RubyGems); 1.13.4 (affected, RubyGems); 1.13.5 (affected, RubyGems); 1.13.6 (affected, RubyGems); 1.13.7 (affected, RubyGems); 1.13.8 (affected, RubyGems); 1.13.9 (affected, RubyGems); 1.14.0 (affected, RubyGems); 1.14.0.rc1 (affected, RubyGems); 1.14.1 (affected, RubyGems); 1.14.2 (affected, RubyGems); 1.14.3 (affected, RubyGems); 1.14.4 (affected, RubyGems); 1.14.5 (affected, RubyGems); 1.15.0 (affected, RubyGems); 1.15.1 (affected, RubyGems); 1.15.2 (affected, RubyGems); 1.15.3 (affected, RubyGems); 1.15.4 (affected, RubyGems); 1.15.5 (affected, RubyGems); 1.15.6 (affected, RubyGems); 1.15.7 (affected, RubyGems); 1.16.0 (affected, RubyGems); 1.16.0.rc1 (affected, RubyGems); 1.16.1 (affected, RubyGems); 1.16.2 (affected, RubyGems); 1.16.3 (affected, RubyGems); 1.16.4 (affected, RubyGems); 1.16.5 (affected, RubyGems); 1.16.6 (affected, RubyGems); 1.16.7 (affected, RubyGems); 1.16.8 (affected, RubyGems); 1.17.0 (affected, RubyGems); 1.17.1 (affected, RubyGems); 1.17.2 (affected, RubyGems); 1.18.0 (affected, RubyGems); 1.18.0.rc1 (affected, RubyGems); 1.18.1 (affected, RubyGems); 1.18.10 (affected, RubyGems); 1.18.2 (affected, RubyGems); 1.18.3 (affected, RubyGems); 1.18.4 (affected, RubyGems); 1.18.5 (affected, RubyGems); 1.18.6 (affected, RubyGems); 1.18.7 (affected, RubyGems); 1.18.8 (affected, RubyGems); 1.18.9 (affected, RubyGems); 1.19.0 (affected, RubyGems); 1.19.1 (affected, RubyGems); 1.19.2 (affected, RubyGems); 1.19.3 (affected, RubyGems); 1.19.4 (affected, RubyGems); 1.2.0 (affected, RubyGems); 1.2.1 (affected, RubyGems); 1.2.2 (affected, RubyGems); 1.2.3 (affected, RubyGems); 1.3.0 (affected, RubyGems); 1.3.1 (affected, RubyGems); 1.3.2 (affected, RubyGems); 1.3.3 (affected, RubyGems); 1.4.0 (affected, RubyGems); 1.4.1 (affected, RubyGems); 1.4.2 (affected, RubyGems); 1.4.2.1 (affected, RubyGems); 1.4.3 (affected, RubyGems); 1.4.3.1 (affected, RubyGems); 1.4.4 (affected, RubyGems); 1.4.4.1 (affected, RubyGems); 1.4.4.2 (affected, RubyGems); 1.4.5 (affected, RubyGems); 1.4.6 (affected, RubyGems); 1.4.7 (affected, RubyGems); 1.5.0 (affected, RubyGems); 1.5.0.beta.1 (affected, RubyGems); 1.5.0.beta.2 (affected, RubyGems); 1.5.0.beta.3 (affected, RubyGems); 1.5.0.beta.4 (affected, RubyGems); 1.5.1 (affected, RubyGems); 1.5.1.rc1 (affected, RubyGems); 1.5.10 (affected, RubyGems); 1.5.11 (affected, RubyGems); 1.5.2 (affected, RubyGems); 1.5.3 (affected, RubyGems); 1.5.3.rc2 (affected, RubyGems); 1.5.3.rc3 (affected, RubyGems); 1.5.3.rc4 (affected, RubyGems); 1.5.3.rc5 (affected, RubyGems); 1.5.3.rc6 (affected, RubyGems); 1.5.4 (affected, RubyGems); 1.5.4.rc1 (affected, RubyGems); 1.5.4.rc2 (affected, RubyGems); 1.5.4.rc3 (affected, RubyGems); 1.5.5 (affected, RubyGems); 1.5.5.rc1 (affected, RubyGems); 1.5.5.rc2 (affected, RubyGems); 1.5.5.rc3 (affected, RubyGems); 1.5.6 (affected, RubyGems); 1.5.6.rc1 (affected, RubyGems); 1.5.6.rc2 (affected, RubyGems); 1.5.6.rc3 (affected, RubyGems); 1.5.7 (affected, RubyGems); 1.5.7.rc1 (affected, RubyGems); 1.5.7.rc2 (affected, RubyGems); 1.5.7.rc3 (affected, RubyGems); 1.5.8 (affected, RubyGems); 1.5.9 (affected, RubyGems); 1.6.0 (affected, RubyGems); 1.6.0.rc1 (affected, RubyGems); 1.6.1 (affected, RubyGems); 1.6.2 (affected, RubyGems); 1.6.2.1 (affected, RubyGems); 1.6.2.rc1 (affected, RubyGems); 1.6.2.rc2 (affected, RubyGems); 1.6.2.rc3 (affected, RubyGems); 1.6.3 (affected, RubyGems); 1.6.3.1 (affected, RubyGems); 1.6.3.rc1 (affected, RubyGems); 1.6.3.rc2 (affected, RubyGems); 1.6.3.rc3 (affected, RubyGems); 1.6.4 (affected, RubyGems); 1.6.4.1 (affected, RubyGems); 1.6.5 (affected, RubyGems); 1.6.6.1 (affected, RubyGems); 1.6.6.2 (affected, RubyGems); 1.6.6.3 (affected, RubyGems); 1.6.6.4 (affected, RubyGems); 1.6.7 (affected, RubyGems); 1.6.7.1 (affected, RubyGems); 1.6.7.2 (affected, RubyGems); 1.6.7.rc2 (affected, RubyGems); 1.6.7.rc3 (affected, RubyGems); 1.6.7.rc4 (affected, RubyGems); 1.6.8 (affected, RubyGems); 1.6.8.1 (affected, RubyGems); 1.6.8.rc1 (affected, RubyGems); 1.6.8.rc2 (affected, RubyGems); 1.6.8.rc3 (affected, RubyGems); 1.7.0 (affected, RubyGems); 1.7.0.1 (affected, RubyGems); 1.7.1 (affected, RubyGems); 1.7.2 (affected, RubyGems); 1.8.0 (affected, RubyGems); 1.8.1 (affected, RubyGems); 1.8.2 (affected, RubyGems); 1.8.3 (affected, RubyGems); 1.8.4 (affected, RubyGems); 1.8.5 (affected, RubyGems); 1.9.0 (affected, RubyGems); 1.9.0.rc1 (affected, RubyGems); 1.9.1 (affected, RubyGems); Ecosystem version events: introduced 0; fixed 1.19.5. Source: OSV GHSA-v995-44v6-5fqm

## Severity and prioritization

- CVSS 3.1: 3.7 (low); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N; source: CNA: GitHub_M

- CVSS 3.1: 3.7 (low); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.38% as of 2026-11-12; percentile 32.49%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-611, CWE-918

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v995-44v6-5fqm (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/sparklemotion/nokogiri/pull/3752 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/sparklemotion/nokogiri/commit/97f41b65f4ee0cac859b87f0b26d2648c4806cb8 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/sparklemotion/nokogiri/commit/e448ca2827a9198644610fb730259e12baacdeac (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/sparklemotion/nokogiri/releases/tag/v1.19.5 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/sparklemotion/nokogiri/commit/97f41b65f4ee0cac859b87f0b26d2648c4806cb8 (security-advisories@github.com)

- https://github.com/sparklemotion/nokogiri/commit/e448ca2827a9198644610fb730259e12baacdeac (security-advisories@github.com)

- https://github.com/sparklemotion/nokogiri/pull/3752 (security-advisories@github.com)

- https://github.com/sparklemotion/nokogiri/releases/tag/v1.19.5 (security-advisories@github.com)

- https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-v995-44v6-5fqm (security-advisories@github.com)

- https://github.com/advisories/GHSA-v995-44v6-5fqm (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-v995-44v6-5fqm (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-126062; retrieved 2026-11-12; source updated 2026-11-12

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-126062; retrieved 2026-11-11; source updated 2026-11-10

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-v995-44v6-5fqm; retrieved 2026-11-10; source updated 2026-11-10

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-126062; retrieved 2026-11-12; source updated Not reported

Revision: 3e005cc94628676e3e8ca3d3a4a287a7418cff1bb78da2a1b8b8103951e441f6

Canonical: https://y2.dev/cve/CVE-2026-126062

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