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Vulnerability details: VCID-8geh-vfns-pfgs
Vulnerability ID VCID-8geh-vfns-pfgs
Aliases CVE-2021-41098
GHSA-2rr5-8q37-2w7h
Summary Improper Restriction of XML External Entity Reference Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support. In Nokogiri v1.12.4, on JRuby only, the SAX parser resolves external entities by default. Users of Nokogiri on JRuby who parse untrusted documents using any of these classes are affected: Nokogiri::XML::SAX::Parse, Nokogiri::HTML4::SAX::Parser or its alias Nokogiri::HTML::SAX::Parser, Nokogiri::XML::SAX::PushParser, and Nokogiri::HTML4::SAX::PushParser or its alias Nokogiri::HTML::SAX::PushParser. JRuby users should upgrade to Nokogiri.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-611 Improper Restriction of XML External Entity Reference
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41098.json
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2021-41098
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2021-41098
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2021-41098
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2021-41098
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2021-41098
epss 0.00564 https://api.first.org/data/v1/epss?cve=CVE-2021-41098
epss 0.00565 https://api.first.org/data/v1/epss?cve=CVE-2021-41098
epss 0.00565 https://api.first.org/data/v1/epss?cve=CVE-2021-41098
epss 0.00565 https://api.first.org/data/v1/epss?cve=CVE-2021-41098
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-2rr5-8q37-2w7h
cvssv3.1 7.5 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2021-41098.yml
generic_textual HIGH https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2021-41098.yml
cvssv3.1 7.5 https://github.com/sparklemotion/nokogiri
generic_textual HIGH https://github.com/sparklemotion/nokogiri
cvssv3.1 7.5 https://github.com/sparklemotion/nokogiri/commit/5bf729ff3cc84709ee3c3248c981584088bf9f6d
generic_textual HIGH https://github.com/sparklemotion/nokogiri/commit/5bf729ff3cc84709ee3c3248c981584088bf9f6d
cvssv3 7.5 https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-2rr5-8q37-2w7h
cvssv3.1 7.5 https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-2rr5-8q37-2w7h
cvssv3.1_qr HIGH https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-2rr5-8q37-2w7h
generic_textual HIGH https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-2rr5-8q37-2w7h
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-41098
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-41098
archlinux High https://security.archlinux.org/AVG-2424
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41098.json
https://api.first.org/data/v1/epss?cve=CVE-2021-41098
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2021-41098.yml
https://github.com/sparklemotion/nokogiri
https://github.com/sparklemotion/nokogiri/commit/5bf729ff3cc84709ee3c3248c981584088bf9f6d
https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-2rr5-8q37-2w7h
2008914 https://bugzilla.redhat.com/show_bug.cgi?id=2008914
AVG-2424 https://security.archlinux.org/AVG-2424
CVE-2021-41098 https://nvd.nist.gov/vuln/detail/CVE-2021-41098
GHSA-2rr5-8q37-2w7h https://github.com/advisories/GHSA-2rr5-8q37-2w7h
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41098.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2021-41098.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/sparklemotion/nokogiri
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/sparklemotion/nokogiri/commit/5bf729ff3cc84709ee3c3248c981584088bf9f6d
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-2rr5-8q37-2w7h
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-41098
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.68362
EPSS Score 0.00564
Published At April 7, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:48:53.072124+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/gem/nokogiri/CVE-2021-41098.yml 38.0.0