# nokogiri (RubyGems) vulnerabilities Source: https://junglewise.ai/threats/technologies/nokogiri Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/nokogiri.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 69 vulnerabilities in nokogiri (RubyGems): 3 in the last 7 days and 20 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-126064, was published on 10 November 2026. Nothing was published in the last eight weeks. ## Counts - Last 7 days: 3 - Last 30 days: 3 - Last 90 days: 20 - All time: 69 (1 critical, 0 exploited in the wild) ## About nokogiri (RubyGems) An open-source XML, HTML, SAX, and Reader parser for Ruby. ## Latest nokogiri (RubyGems) vulnerabilities - [CVE-2026-126064: Nokogiri use-after-free in attribute replacement](https://junglewise.ai/threats/cve-2026-126064-nokogiri-is-an-open-source-xml-and-html-library-for-the-ruby) (medium, CVSS 4, published 10 Nov 2026) - [CVE-2026-126063: Nokogiri HTML5 serializer mutation XSS via noscript and attributes](https://junglewise.ai/threats/cve-2026-126063-nokogiri-is-an-open-source-xml-and-html-library-for-the-ruby) (medium, CVSS 4, published 10 Nov 2026) - [CVE-2026-126062: JRuby: NONET is bypassed for external DTDs and entities when the systemId uses a short-form IPv4 host](https://junglewise.ai/threats/cve-2026-126062-nokogiri-is-an-open-source-xml-and-html-library-for-the-ruby) (low, CVSS 3.7, published 10 Nov 2026) - [Nokogiri unchecked return value in canonicalize method](https://junglewise.ai/threats/nokogiri-unchecked-return-value-in-canonicalize-method-3863de91) (medium, CVSS 5.3, published 25 Aug 2026) - [Nokogiri CSS selector tokenizer ReDoS](https://junglewise.ai/threats/nokogiri-css-selector-tokenizer-redos-d52ae203) (high, CVSS 7.5, published 25 Aug 2026) - [Nokogiri XSLT transform memory leak](https://junglewise.ai/threats/nokogiri-xslt-transform-memory-leak-0441ddf7) (medium, CVSS 5.3, published 25 Aug 2026) - [CVE-2026-79772: Nokogiri CRuby unchecked return value in canonicalize](https://junglewise.ai/threats/cve-2026-79772-nokogiri-cruby-unchecked-return-value-in-canonicalize) (medium, CVSS 5.3, published 25 Aug 2026) - [CVE-2026-79771: Nokogiri XSLT Stylesheet transform memory leak](https://junglewise.ai/threats/cve-2026-79771-nokogiri-xslt-stylesheet-transform-memory-leak) (medium, CVSS 5.3, published 25 Aug 2026) - [CVE-2026-79770: Nokogiri CSS selector tokenizer regular expression DoS](https://junglewise.ai/threats/cve-2026-79770-nokogiri-css-selector-tokenizer-regular-expression-dos) (high, CVSS 7.5, published 25 Aug 2026) - [CVE-2026-79769: Nokogiri invalid memory read in Node#initialize_copy_with_args](https://junglewise.ai/threats/cve-2026-79769-nokogiri-invalid-memory-read-in-node-initialize-copy-with-args) (medium, CVSS 5.5, published 25 Aug 2026) - [CVE-2025-71407: Rejected CVE duplicate](https://junglewise.ai/threats/cve-2025-71407-rejected-cve-duplicate) (info, published 25 Aug 2026) - [CVE-2025-71406: rejected duplicate](https://junglewise.ai/threats/cve-2025-71406-rejected-duplicate) (low, CVSS 3.1, published 25 Aug 2026) - [CVE-2025-71346: duplicate rejected advisory](https://junglewise.ai/threats/cve-2025-71346-duplicate-rejected-advisory) (info, published 25 Aug 2026) - [CVE-2024-58378: Duplicate CVE identifier](https://junglewise.ai/threats/cve-2024-58378-duplicate-cve-identifier) (info, published 25 Aug 2026) - [CVE-2024-58377: duplicate rejection](https://junglewise.ai/threats/cve-2024-58377-duplicate-rejection) (info, published 25 Aug 2026) - [CVE-2023-54354: Rejected CVE duplicate](https://junglewise.ai/threats/cve-2023-54354-rejected-cve-duplicate) (info, published 25 Aug 2026) - [CVE-2022-51000: Rejected duplicate advisory](https://junglewise.ai/threats/cve-2022-51000-rejected-duplicate-advisory) (info, published 25 Aug 2026) - [CVE-2022-50999: Duplicate CVE entry](https://junglewise.ai/threats/cve-2022-50999-duplicate-cve-entry) (low, CVSS 3.1, published 25 Aug 2026) - [CVE-2022-50998: duplicate rejected](https://junglewise.ai/threats/cve-2022-50998-duplicate-rejected) (info, published 25 Aug 2026) - [CVE-2021-47996: duplicate rejection](https://junglewise.ai/threats/cve-2021-47996-duplicate-rejection) (info, published 25 Aug 2026) - [CVE-2026-57438: Nokogiri use-after-free in XInclude processing](https://junglewise.ai/threats/cve-2026-57438-nokogiri-use-after-free-in-xinclude-processing) (info, CVSS 2.2, published 25 Jun 2026) - [CVE-2026-57437: Nokogiri use-after-free in XML::XPathContext](https://junglewise.ai/threats/cve-2026-57437-nokogiri-use-after-free-in-xml-xpathcontext) (medium, CVSS 4, published 25 Jun 2026) - [CVE-2026-57436: Nokogiri use-after-free in Document root assignment](https://junglewise.ai/threats/cve-2026-57436-nokogiri-use-after-free-in-document-root-assignment) (medium, CVSS 4, published 25 Jun 2026) - [CVE-2026-57435: Nokogiri use-after-free in XML attribute value replacement](https://junglewise.ai/threats/cve-2026-57435-nokogiri-use-after-free-in-xml-attribute-value-replacement) (medium, CVSS 4, published 25 Jun 2026) - [CVE-2026-57434: Nokogiri NULL pointer dereference in XML Node wrapper classes](https://junglewise.ai/threats/cve-2026-57434-nokogiri-null-pointer-dereference-in-xml-node-wrapper-classes) (medium, CVSS 4, published 25 Jun 2026) ## Most severe nokogiri (RubyGems) vulnerabilities - [CVE-2019-11068: Nokogiri libxslt protection mechanism bypass via crafted URL](https://junglewise.ai/threats/cve-2019-11068-nokogiri-libxslt-protection-mechanism-bypass-via-crafted-url) (critical, CVSS 9.8, published 13 May 2022) - [CVE-2019-13118: Nokogiri libxslt type confusion in xsl:number instruction](https://junglewise.ai/threats/cve-2019-13118-nokogiri-libxslt-type-confusion-in-xsl-number-instruction) (high, CVSS 7.5, published 24 May 2022) - [CVE-2019-18197: Nokogiri Use After Free in libxslt dependency](https://junglewise.ai/threats/cve-2019-18197-nokogiri-use-after-free-in-libxslt-dependency) (high, CVSS 7.5, published 24 May 2022) - [CVE-2026-79770: Nokogiri CSS selector tokenizer regular expression DoS](https://junglewise.ai/threats/cve-2026-79770-nokogiri-css-selector-tokenizer-regular-expression-dos) (high, CVSS 7.5, published 25 Aug 2026) - [Nokogiri CSS selector tokenizer ReDoS](https://junglewise.ai/threats/nokogiri-css-selector-tokenizer-redos-d52ae203) (high, CVSS 7.5, published 25 Aug 2026) - [CVE-2026-79769: Nokogiri invalid memory read in Node#initialize_copy_with_args](https://junglewise.ai/threats/cve-2026-79769-nokogiri-invalid-memory-read-in-node-initialize-copy-with-args) (medium, CVSS 5.5, published 25 Aug 2026) - [CVE-2019-13117: Nokogiri uninitialized read in libxslt xsl:number processing](https://junglewise.ai/threats/cve-2019-13117-nokogiri-uninitialized-read-in-libxslt-xsl-number-processing) (medium, CVSS 5.3, published 24 May 2022) - [CVE-2026-79771: Nokogiri XSLT Stylesheet transform memory leak](https://junglewise.ai/threats/cve-2026-79771-nokogiri-xslt-stylesheet-transform-memory-leak) (medium, CVSS 5.3, published 25 Aug 2026) - [CVE-2026-79772: Nokogiri CRuby unchecked return value in canonicalize](https://junglewise.ai/threats/cve-2026-79772-nokogiri-cruby-unchecked-return-value-in-canonicalize) (medium, CVSS 5.3, published 25 Aug 2026) - [Nokogiri unchecked return value in canonicalize method](https://junglewise.ai/threats/nokogiri-unchecked-return-value-in-canonicalize-method-3863de91) (medium, CVSS 5.3, published 25 Aug 2026) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 17 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 3 | 0 | 0 | ## Other RubyGems technologies - [actionpack (RubyGems)](https://junglewise.ai/threats/technologies/actionpack): 77 vulnerabilities - [rack (RubyGems)](https://junglewise.ai/threats/technologies/rack): 55 vulnerabilities - [activerecord (RubyGems)](https://junglewise.ai/threats/technologies/rubygems-activerecord): 26 vulnerabilities - [rubygems-update (RubyGems)](https://junglewise.ai/threats/technologies/rubygems-update): 25 vulnerabilities - [puppet (RubyGems)](https://junglewise.ai/threats/technologies/puppet): 23 vulnerabilities - [activesupport (RubyGems)](https://junglewise.ai/threats/technologies/activesupport): 20 vulnerabilities - [actionview (RubyGems)](https://junglewise.ai/threats/technologies/actionview): 19 vulnerabilities - [activestorage (RubyGems)](https://junglewise.ai/threats/technologies/activestorage): 19 vulnerabilities - [camaleon_cms (RubyGems)](https://junglewise.ai/threats/technologies/camaleon-cms): 19 vulnerabilities - [rails-html-sanitizer (RubyGems)](https://junglewise.ai/threats/technologies/rails-html-sanitizer): 18 vulnerabilities - [loofah (RubyGems)](https://junglewise.ai/threats/technologies/loofah): 17 vulnerabilities - [publify_core (RubyGems)](https://junglewise.ai/threats/technologies/publify-core): 15 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "nokogiri (RubyGems) vulnerabilities", https://junglewise.ai/threats/technologies/nokogiri, 13 November 2026.