{"answers":{"affected":"2 open source packages ship an affected version, including sanitize-html.","exploited":"There is no known exploitation of CVE-2026-84371 in the wild and no public exploit code.","fix":"Upgrade sanitize-html to 2.17.7 or later.","what":"CVE-2026-84371 is a medium-severity cross-site scripting vulnerability in apostrophecms apostrophe, published on 1 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-84371 and fix it if it is affected.\n\nWhat it is: CVE-2026-84371 is a medium-severity cross-site scripting vulnerability in apostrophecms apostrophe, published on 1 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-84371 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- sanitize-html (npm): affected from 1.9.0; fixed in 2.17.7\n- sanitize-html (npm): affected from 1.9.0; fixed in 2.17.7\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-2026-84371/ (Markdown: https://insights.sbomify.com/CVE-2026-84371/index.md)","id":"CVE-2026-84371","markdown":"https://insights.sbomify.com/CVE-2026-84371/index.md","name":"CVE-2026-84371","record":{"aliases":["CLEANSTART-2026-LG36939","CLSA-2026-1788517172","ECHO-bd72-1c82-327f","GHSA-g8qq-57p8-ggw5","MINI-2jf4-jpmp-2ph2","MINI-555r-9x7w-9g7q","MINI-hm7c-hwmg-h75f","MINI-jf9v-mq99-xp4c"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"ApostropheCMS","requires_auth":"low_privilege","summary":"Stored XSS in ApostropheCMS allows script execution via SVG SMIL attributes when animation elements are enabled.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. From version 1.9.0 until version 2.17.7, packages/sanitize-html/index.js validates an animation value attribute as one flat URL and does not recognize that attributeName selecting href or xlink:href gives the sibling values, from, to, or by attribute SVG SMIL URL semantics. In configurations that allow the animate, animateColor, animateMotion, animateTransform, or set elements, a values list can begin with a safe fragment and contain a later executable destination that survives allowedSchemesAppliedToAttributes checking. When the sanitized SVG is rendered, the browser can copy that later destination into the live link, and a victim who activates the link can execute script in the application's origin. This issue is fixed in version 2.17.7.","ecosystems":["npm"],"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":"ApostropheCMS: Stored XSS via SVG SMIL URI-list scheme-policy bypass","id":"CVE-2026-84371","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":5,"next":{"headline":"Predis: Redis command injection and denial of service via CRLF smuggling in pipelined commands on aggregate connections","id":"CVE-2026-84372"},"packages":[{"ecosystem":"npm","fixed":["2.17.7"],"introduced":["1.9.0"],"last_affected":[],"package":"sanitize-html","purl":null,"source":"GHSA-g8qq-57p8-ggw5"},{"ecosystem":"npm","fixed":["2.17.7"],"introduced":["1.9.0"],"last_affected":[],"package":"sanitize-html","purl":"pkg:npm/sanitize-html","source":"GHSA-g8qq-57p8-ggw5"}],"prev":{"headline":"SVGO: removeScripts allows executable links through namespace and control-character bypasses","id":"CVE-2026-84370"},"products":["apostrophe"],"published":"2026-09-01","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-02","vendors":["apostrophecms"]},"summary":"Stored XSS in ApostropheCMS allows script execution via SVG SMIL attributes when animation elements are enabled.","url":"https://insights.sbomify.com/CVE-2026-84371/"}