CVE-2020-26247

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.

• CWE-611
• CWE-611

• https://github.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97bPatch, Third Party Advisory
• https://github.com/sparklemotion/nokogiri/releases/tag/v1.11.0.rc4Release Notes, Third Party Advisory
• https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-vr8q-g5c7-m54mMitigation, Third Party Advisory
• https://hackerone.com/reports/747489Permissions Required
• https://lists.debian.org/debian-lts-announce/2021/06/msg00007.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/10/msg00018.htmlMailing List, Third Party Advisory
• https://rubygems.org/gems/nokogiriProduct, Third Party Advisory
• https://security.gentoo.org/glsa/202208-29Third Party Advisory
• https://github.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97bPatch, Third Party Advisory
• https://github.com/sparklemotion/nokogiri/releases/tag/v1.11.0.rc4Release Notes, Third Party Advisory
• https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-vr8q-g5c7-m54mMitigation, Third Party Advisory
• https://hackerone.com/reports/747489Permissions Required
• https://lists.debian.org/debian-lts-announce/2021/06/msg00007.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/10/msg00018.htmlMailing List, Third Party Advisory
• https://rubygems.org/gems/nokogiriProduct, Third Party Advisory
• https://security.gentoo.org/glsa/202208-29Third Party Advisory

Published

Dec 30, 2020

Last Modified

Jun 17, 2026

Status

Modified

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