Low severity2.6NVD Advisory· Published Dec 30, 2020· Updated Jun 17, 2026

CVE-2020-26247

Description

Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support. In Nokogiri before version 1.11.0.rc4 there is an XXE vulnerability. XML Schemas parsed by Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network, potentially enabling XXE or SSRF attacks. This behavior is counter to the security policy followed by Nokogiri maintainers, which is to treat all input as untrusted by default whenever possible. This is fixed in Nokogiri version 1.11.0.rc4.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
nokogiriRubyGems	< 1.11.0	1.11.0

Affected products

122

Nokogiri/Nokogiri4 versions
cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:ruby:*:*+ 3 more
- cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:ruby:*:*range: <1.11.0
- cpe:2.3:a:nokogiri:nokogiri:1.11.0:rc1:*:*:*:ruby:*:*
- cpe:2.3:a:nokogiri:nokogiri:1.11.0:rc2:*:*:*:ruby:*:*
- cpe:2.3:a:nokogiri:nokogiri:1.11.0:rc3:*:*:*:ruby:*:*
Debian/linux2 versions
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
ghsa-coords115 versions
pkg:gem/nokogiri pkg:rpm/opensuse/rubygem-nokogiri&distro=openSUSE%20Leap%2015.2 pkg:rpm/suse/ardana-cobbler&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/ardana-cobbler&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/cassandra&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/cassandra&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/cassandra&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/crowbar-core&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/crowbar-openstack&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/documentation-hpe-helion-openstack-installation&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/documentation-hpe-helion-openstack-operations&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/documentation-hpe-helion-openstack-opsconsole&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/documentation-hpe-helion-openstack-planning&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/documentation-hpe-helion-openstack-security&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/documentation-hpe-helion-openstack-user&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/documentation-suse-openstack-cloud-deployment&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/documentation-suse-openstack-cloud-installation&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/documentation-suse-openstack-cloud-operations&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/documentation-suse-openstack-cloud-opsconsole&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/documentation-suse-openstack-cloud-planning&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/documentation-suse-openstack-cloud-security&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/documentation-suse-openstack-cloud-supplement&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/documentation-suse-openstack-cloud-supplement&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/documentation-suse-openstack-cloud-upstream-admin&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/documentation-suse-openstack-cloud-upstream-admin&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/documentation-suse-openstack-cloud-upstream-user&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/documentation-suse-openstack-cloud-upstream-user&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/documentation-suse-openstack-cloud-user&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/grafana&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/grafana&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/grafana&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/kibana&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/kibana&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/kibana&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/openstack-heat-templates&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/openstack-heat-templates&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/openstack-heat-templates&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/openstack-monasca-installer&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/openstack-monasca-installer&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/openstack-monasca-installer&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/openstack-nova&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/openstack-nova&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/openstack-nova&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/openstack-nova-doc&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/openstack-nova-doc&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/openstack-nova-doc&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/python-Django&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/python-Django&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/python-Django&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/python-elementpath&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/python-elementpath&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/python-elementpath&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/python-eventlet&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/python-eventlet&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/python-eventlet&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/python-py&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/python-py&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/python-py&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/python-pysaml2&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/python-pysaml2&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/python-pysaml2&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/python-xmlschema&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/python-xmlschema&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/python-xmlschema&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/rubygem-activerecord-session_store&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/rubygem-nokogiri&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015 pkg:rpm/suse/rubygem-nokogiri&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP1 pkg:rpm/suse/rubygem-nokogiri&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2 pkg:rpm/suse/rubygem-nokogiri&distro=SUSE%20OpenStack%20Cloud%207 pkg:rpm/suse/rubygem-nokogiri&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/rubygem-nokogiri&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/suse/venv-openstack-aodh&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-aodh&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-barbican&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-barbican&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-ceilometer&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-ceilometer&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-cinder&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-cinder&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-designate&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-designate&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-freezer&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-freezer&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-glance&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-glance&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-heat&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-heat&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-horizon&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-horizon-hpe&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-ironic&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-ironic&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-keystone&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-keystone&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-magnum&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-magnum&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-manila&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-manila&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-monasca&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-monasca&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-monasca-ceilometer&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-monasca-ceilometer&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-murano&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-murano&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-neutron&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-neutron&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-nova&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-nova&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-octavia&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-octavia&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-sahara&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-sahara&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-swift&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-swift&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/venv-openstack-trove&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/venv-openstack-trove&distro=SUSE%20OpenStack%20Cloud%208
< 1.11.0+ 114 more
- (no CPE)range: < 1.11.0
- (no CPE)range: < 1.8.5-lp152.4.3.1
- (no CPE)range: < 8.0+git.1614096566.e8c2b27-3.44.3
- (no CPE)range: < 8.0+git.1614096566.e8c2b27-3.44.3
- (no CPE)range: < 3.11.10-5.3.5
- (no CPE)range: < 3.11.10-5.3.5
- (no CPE)range: < 3.11.10-5.3.5
- (no CPE)range: < 5.0+git.1622489449.a8e60e238-3.50.4
- (no CPE)range: < 5.0+git.1616001417.67fd9c2a1-4.52.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 8.20210512-1.32.5
- (no CPE)range: < 6.7.4-4.18.2
- (no CPE)range: < 6.7.4-4.18.2
- (no CPE)range: < 6.7.4-4.18.2
- (no CPE)range: < 4.6.6-3.9.2
- (no CPE)range: < 4.6.6-3.9.2
- (no CPE)range: < 4.6.6-3.9.2
- (no CPE)range: < 0.0.0+git.1623056900.7917e18-3.21.3
- (no CPE)range: < 0.0.0+git.1623056900.7917e18-3.21.3
- (no CPE)range: < 0.0.0+git.1623056900.7917e18-3.21.3
- (no CPE)range: < 20190923_16.32-3.18.2
- (no CPE)range: < 20190923_16.32-3.18.2
- (no CPE)range: < 20190923_16.32-3.18.2
- (no CPE)range: < 16.1.9~dev92-3.48.5
- (no CPE)range: < 16.1.9~dev92-3.48.5
- (no CPE)range: < 16.1.9~dev92-3.48.5
- (no CPE)range: < 16.1.9~dev92-3.48.5
- (no CPE)range: < 16.1.9~dev92-3.48.5
- (no CPE)range: < 16.1.9~dev92-3.48.5
- (no CPE)range: < 1.11.29-3.25.3
- (no CPE)range: < 1.11.29-3.25.3
- (no CPE)range: < 1.11.29-3.25.3
- (no CPE)range: < 1.3.1-1.3.2
- (no CPE)range: < 1.3.1-1.3.2
- (no CPE)range: < 1.3.1-1.3.2
- (no CPE)range: < 0.20.0-6.3.3
- (no CPE)range: < 0.20.0-6.3.3
- (no CPE)range: < 0.20.0-6.3.3
- (no CPE)range: < 1.4.34-3.3.3
- (no CPE)range: < 1.4.34-3.3.3
- (no CPE)range: < 1.4.34-3.3.3
- (no CPE)range: < 4.0.2-5.9.2
- (no CPE)range: < 4.0.2-5.9.2
- (no CPE)range: < 4.0.2-5.9.2
- (no CPE)range: < 1.0.18-1.3.3
- (no CPE)range: < 1.0.18-1.3.3
- (no CPE)range: < 1.0.18-1.3.3
- (no CPE)range: < 0.1.2-3.3.2
- (no CPE)range: < 1.8.5-3.6.1
- (no CPE)range: < 1.8.5-3.6.1
- (no CPE)range: < 1.8.5-3.6.1
- (no CPE)range: < 1.6.1-5.3.1
- (no CPE)range: < 1.6.1-5.3.1
- (no CPE)range: < 1.6.1-5.3.1
- (no CPE)range: < 5.1.1~dev7-12.32.3
- (no CPE)range: < 5.1.1~dev7-12.32.3
- (no CPE)range: < 5.0.2~dev3-12.33.3
- (no CPE)range: < 5.0.2~dev3-12.33.3
- (no CPE)range: < 9.0.8~dev7-12.30.3
- (no CPE)range: < 9.0.8~dev7-12.30.3
- (no CPE)range: < 11.2.3~dev29-14.34.2
- (no CPE)range: < 11.2.3~dev29-14.34.2
- (no CPE)range: < 5.0.3~dev7-12.31.3
- (no CPE)range: < 5.0.3~dev7-12.31.3
- (no CPE)range: < 5.0.0.0~xrc2~dev2-10.28.3
- (no CPE)range: < 5.0.0.0~xrc2~dev2-10.28.3
- (no CPE)range: < 15.0.3~dev3-12.31.3
- (no CPE)range: < 15.0.3~dev3-12.31.3
- (no CPE)range: < 9.0.8~dev22-12.33.2
- (no CPE)range: < 9.0.8~dev22-12.33.2
- (no CPE)range: < 12.0.5~dev6-14.36.6
- (no CPE)range: < 12.0.5~dev6-14.36.3
- (no CPE)range: < 9.1.8~dev8-12.33.3
- (no CPE)range: < 9.1.8~dev8-12.33.3
- (no CPE)range: < 12.0.4~dev11-11.35.3
- (no CPE)range: < 12.0.4~dev11-11.35.3
- (no CPE)range: < 5.0.2_5.0.2_5.0.2~dev31-11.32.2
- (no CPE)range: < 5.0.2_5.0.2_5.0.2~dev31-11.32.2
- (no CPE)range: < 5.1.1~dev5-12.37.3
- (no CPE)range: < 5.1.1~dev5-12.37.3
- (no CPE)range: < 2.2.2~dev1-11.28.3
- (no CPE)range: < 2.2.2~dev1-11.28.3
- (no CPE)range: < 1.5.1_1.5.1_1.5.1~dev3-8.28.3
- (no CPE)range: < 1.5.1_1.5.1_1.5.1~dev3-8.28.3
- (no CPE)range: < 4.0.2~dev2-12.28.3
- (no CPE)range: < 4.0.2~dev2-12.28.3
- (no CPE)range: < 11.0.9~dev69-13.38.3
- (no CPE)range: < 11.0.9~dev69-13.38.3
- (no CPE)range: < 16.1.9~dev92-11.36.3
- (no CPE)range: < 16.1.9~dev92-11.36.3
- (no CPE)range: < 1.0.6~dev3-12.33.3
- (no CPE)range: < 1.0.6~dev3-12.33.3
- (no CPE)range: < 7.0.5~dev4-11.32.3
- (no CPE)range: < 7.0.5~dev4-11.32.3
- (no CPE)range: < 2.15.2_2.15.2_2.15.2~dev32-11.23.3
- (no CPE)range: < 2.15.2_2.15.2_2.15.2~dev32-11.23.3
- (no CPE)range: < 8.0.2~dev2-11.32.3
- (no CPE)range: < 8.0.2~dev2-11.32.3
Sparklemotion/Nokogiricpe-rescue
Range: < 1.11.0.rc4

Patches

Vulnerability mechanics

References

github.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97bnvdPatchThird Party AdvisoryWEB
github.com/advisories/GHSA-vr8q-g5c7-m54mghsaADVISORY
github.com/sparklemotion/nokogiri/releases/tag/v1.11.0.rc4nvdRelease NotesThird Party AdvisoryWEB
github.com/sparklemotion/nokogiri/security/advisories/GHSA-vr8q-g5c7-m54mnvdMitigationThird Party AdvisoryWEB
lists.debian.org/debian-lts-announce/2021/06/msg00007.htmlnvdMailing ListThird Party AdvisoryWEB
lists.debian.org/debian-lts-announce/2022/10/msg00018.htmlnvdMailing ListThird Party AdvisoryWEB
nvd.nist.gov/vuln/detail/CVE-2020-26247ghsaADVISORY
rubygems.org/gems/nokogirinvdProductThird Party AdvisoryWEB
security.gentoo.org/glsa/202208-29nvdThird Party AdvisoryWEB
github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2020-26247.ymlghsaWEB
github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.mdghsaWEB
hackerone.com/reports/747489nvdPermissions RequiredWEB

News mentions

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cvss	0.169
epss	0.001
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000