{"answers":{"affected":"1 open source package ship an affected version, including nokogiri.","exploited":"There is no known exploitation of CVE-2026-126063 in the wild and no public exploit code.","exposure":"","fix":"Upgrade nokogiri to 1.19.5 or later.","what":"CVE-2026-126063 is a low-severity vulnerability in sparklemotion nokogiri, published on 10 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-126063 and fix it if it is affected.\n\nWhat it is: CVE-2026-126063 is a low-severity vulnerability in sparklemotion nokogiri, published on 10 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-126063 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- nokogiri (RubyGems): affected from 1.12.0; fixed in 1.19.5\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-126063/ (Markdown: https://insights.sbomify.com/CVE-2026-126063/index.md)","id":"CVE-2026-126063","markdown":"https://insights.sbomify.com/CVE-2026-126063/index.md","name":"CVE-2026-126063","record":{"aliases":["DEBIAN-CVE-2026-126063","GHSA-4p39-36wj-23h4","UBUNTU-CVE-2026-126063"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":2.3,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"},{"id":"CWE-116","name":"Improper Encoding or Escaping of Output"}],"description":"Nokogiri is an open source XML and HTML library for the Ruby programming language. From 1.12.0 until 1.19.5, the C extension on CRuby and TruffleRuby has a Nokogiri::HTML5 serializer that does not escape text inside noscript elements or angle brackets inside attribute values. When an application sanitizes untrusted HTML with the default parsing options, allows noscript, and sends serialized output to a scripting-enabled browser, the browser can parse markup that Nokogiri did not produce, enabling mutation cross-site scripting. Using parse_noscript_content_as_text: true is the recommended workaround, not the vulnerable default. JRuby is not affected because it does not implement Nokogiri::HTML5. This issue is fixed in version 1.19.5.","ecosystems":["RubyGems"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Nokogiri: Mutation XSS through `noscript` content in Nokogiri's HTML5 serializer","id":"CVE-2026-126063","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":5,"next":{"headline":"Nokogiri: Possible Use-After-Free when setting an attribute value via `Nokogiri::XML::Node#[]=` or `#lang=`","id":"CVE-2026-126064"},"nickname":null,"packages":[{"ecosystem":"RubyGems","fixed":["1.19.5"],"introduced":["1.12.0"],"last_affected":[],"package":"nokogiri","purl":null,"source":"GHSA-4p39-36wj-23h4"}],"prev":{"headline":"Nokogiri : Possible SSRF on JRuby when resolving external DTDs or entities with `NONET` set","id":"CVE-2026-126062"},"products":["nokogiri"],"published":"2026-11-10","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-11-10","vendors":["sparklemotion"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-126063/"}