{"answers":{"affected":"2 open source packages ship an affected version, including dompurify. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-65898 in the wild and no public exploit code.","fix":"Upgrade dompurify to 3.4.11 or later.","what":"CVE-2026-65898 is a medium-severity cross-site scripting vulnerability in cure53 DOMPurify, published on 23 Jul 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-2026-65898 and fix it if it is affected.\n\nWhat it is: CVE-2026-65898 is a medium-severity cross-site scripting vulnerability in cure53 DOMPurify, published on 23 Jul 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-2026-65898 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- dompurify (npm): affected all versions; fixed in 3.4.11\n- dompurify (npm): affected all versions; fixed in 3.4.11\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-2026-65898/ (Markdown: https://insights.sbomify.com/CVE-2026-65898/index.md)","id":"CVE-2026-65898","markdown":"https://insights.sbomify.com/CVE-2026-65898/index.md","name":"CVE-2026-65898","record":{"aliases":["CLEANSTART-2026-BB38451","CLEANSTART-2026-IE01386","CLSA-2026-1784596280","CLSA-2026-1784596304","CLSA-2026-1784596347","CLSA-2026-1784682972","DEBIAN-CVE-2026-65898","ECHO-37cc-ac1b-a55e","GHSA-cmwh-pvxp-8882","MINI-28gw-gvfx-pqvh","MINI-6gqj-4g9p-v4gw","MINI-78j7-6whh-w49j","MINI-7crh-jxrq-739c","MINI-7j2x-78wf-39jf","MINI-7xmp-95pv-ghgx","MINI-cj63-67wm-84vh","MINI-h7x5-h6q6-pff5","MINI-jw3g-xjx6-6jgq","MINI-p3rp-23mw-3qjf","MINI-ph5c-c3hw-f675","MINI-qc8j-4mgp-8j2v","MINI-vr74-jpr6-jrgc","MINI-wcw3-9g5h-6vwr","MINI-wx3p-vf25-r9w9","MINI-x47h-qhpj-qfpg","MINI-x6vf-rjm2-vq5v","MINI-xhp8-5fx3-566m","ROOT-APP-NPM-CVE-2026-65898","ROOT-APP-NPM-GHSA-cmwh-pvxp-8882","UBUNTU-CVE-2026-65898"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"JavaScript sanitization library","requires_auth":"low_privilege","summary":"Attackers can exploit a DOMPurify configuration flaw to permanently pollute attribute allowlists, enabling stored XSS via event handlers.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"dompurify","vendor":"cure53"}],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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"}],"description":"DOMPurify before 3.4.11 fails to clone the ALLOWED_ATTR allowlist when setConfig() is used with an uponSanitizeAttribute hook, allowing the hook to permanently mutate the shared allowlist. Attackers can register a hook that conditionally allows dangerous attributes like onerror for trusted elements, then submit untrusted content that inherits the polluted allowlist and executes event handlers as stored XSS.","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":"DOMPurify before 3.4.11 Permanent Attribute Allowlist Pollution via setConfig","id":"CVE-2026-65898","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"DOMPurify before 3.4.9 Trusted Types Policy State Contamination","id":"CVE-2026-65899"},"packages":[{"ecosystem":"npm","fixed":["3.4.11"],"introduced":["0"],"last_affected":[],"package":"dompurify","purl":null,"source":"GHSA-cmwh-pvxp-8882"},{"ecosystem":"npm","fixed":["3.4.11"],"introduced":["0"],"last_affected":[],"package":"dompurify","purl":"pkg:npm/dompurify","source":"GHSA-cmwh-pvxp-8882"}],"prev":{"headline":"Grav API Plugin 1.0.9 Privilege Escalation via Invitations groups","id":"CVE-2026-65897"},"products":["DOMPurify"],"published":"2026-07-23","related":[{"cvss_score":10,"headline":"DOMPurify nesting-based mXSS","id":"CVE-2024-47875","kev_date_added":null,"published":"2024-10-11"},{"cvss_score":9.1,"headline":"DOMPurify vulnerable to tampering by prototype polution","id":"CVE-2024-48910","kev_date_added":null,"published":"2024-10-31"},{"cvss_score":8.2,"headline":"DOMPurify XSS via `selectedcontent` re-clone","id":"CVE-2026-47423","kev_date_added":null,"published":"2026-07-14"},{"cvss_score":7.3,"headline":"Tampering by prototype polution in DOMPurify","id":"CVE-2024-45801","kev_date_added":null,"published":"2024-09-16"},{"cvss_score":6.3,"headline":"DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside \u003ctemplate\u003e.content","id":"CVE-2026-49978","kev_date_added":null,"published":"2026-07-14"},{"cvss_score":6.1,"headline":"DOMPurify: Cross-realm IN_PLACE sanitization leaves executable markup intact via realm-bound `instanceof` checks","id":"CVE-2026-49458","kev_date_added":null,"published":"2026-07-14"},{"cvss_score":6.1,"headline":"DOMPurify: IN_PLACE mode preserves attributes of a clobbered root element, allowing XSS via attacker-controlled root DOM","id":"CVE-2026-49459","kev_date_added":null,"published":"2026-07-14"}],"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":"US public information, NVD API terms","name":"NVD"},{"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":"2026-07-23","vendors":["cure53"]},"summary":"Attackers can exploit a DOMPurify configuration flaw to permanently pollute attribute allowlists, enabling stored XSS via event handlers.","url":"https://insights.sbomify.com/CVE-2026-65898/"}