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CVE-2020-26247

2.6 · LOW

Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support.

Published Dec 30, 2020CWE-611EPSS 1.18%

Overview

CVE-2020-26247 is a low-severity vulnerability. It was published on December 30, 2020 and has a CVSS 3.1 base score of 2.6 (LOW).

This vulnerability has a CVSS 3.1 base score of 2.6, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97bGitHubgithub.com/sparklemotion/nokogiri/releases/tag/v1.11.0.rc4GitHubgithub.com/sparklemotion/nokogiri/security/advisories/GHSA-vr8q-g5c7-m54mRefhackerone.com/reports/747489Reflists.debian.org/debian-lts-announce/2021/06/msg00007.htmlReflists.debian.org/debian-lts-announce/2022/10/msg00018.htmlRefrubygems.org/gems/nokogiriRefsecurity.gentoo.org/glsa/202208-29GitHubgithub.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97bGitHubgithub.com/sparklemotion/nokogiri/releases/tag/v1.11.0.rc4

How CyberStrike helps

Frequently asked questions

What is CVE-2020-26247?

CVE-2020-26247 is a low-severity vulnerability. It was published on December 30, 2020 and has a CVSS 3.1 base score of 2.6 (LOW).

How severe is CVE-2020-26247?

This vulnerability has a CVSS 3.1 base score of 2.6, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-26247?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-26247?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-26247 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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