What’s Vulnerable › Vulnerabilities

CVE-2022-29181: Improper Handling of Unexpected Data Type in Nokogiri

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-05-20 · updated 2026-06-17
• Weakness: CWE-241

Description

Nokogiri is an open source XML and HTML library for Ruby. Nokogiri prior to version 1.13.6 does not type-check all inputs into the XML and HTML4 SAX parsers, allowing specially crafted untrusted inputs to cause illegal memory access errors (segfault) or reads from unrelated memory. Version 1.13.6 contains a patch for this issue. As a workaround, ensure the untrusted input is a `String` by calling `#to_s` or equivalent.

Affected products

• Apple macOS: from 13.0 before 13.1 — fixed in 13.1
• sparklemotion nokogiri: before 1.13.6 — fixed in 1.13.6
• Rubygems Nokogiri: before 1.13.6; 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5 (+139) — fixed in 1.13.6

How to fix

Upgrade to a fixed version: Apple macOS 13.1; sparklemotion nokogiri 1.13.6; Rubygems Nokogiri 1.13.6. Check the vendor advisory for mitigations.

References

• https://github.com/sparklemotion/nokogiri/commit/83cc451c3f29df397caa890afc3b714eae6ab8f7
• https://github.com/sparklemotion/nokogiri/commit/db05ba9a1bd4b90aa6c76742cf6102a7c7297267
• https://github.com/sparklemotion/nokogiri/releases/tag/v1.13.6
• https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-xh29-r2w5-wx8m
• https://securitylab.github.com/advisories/GHSL-2022-031_GHSL-2022-032_Nokogiri
• http://seclists.org/fulldisclosure/2022/Dec/23
• https://github.com/sparklemotion/nokogiri/commit/db05ba9a1bd4b90aa6c76742cf6102a7c7297267
• https://github.com/sparklemotion/nokogiri/releases/tag/v1.13.6
• https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-xh29-r2w5-wx8m
• https://security.gentoo.org/glsa/202208-29
• https://securitylab.github.com/advisories/GHSL-2022-031_GHSL-2022-032_Nokogiri/
• https://support.apple.com/kb/HT213532

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