{"answers":{"affected":"2 open source packages ship an affected version, including dompurify. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49459 exists.","fix":"Upgrade dompurify to 3.4.6 or later.","what":"CVE-2026-49459 is a medium-severity cross-site scripting vulnerability in cure53 DOMPurify, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-49459 and fix it if it is affected.\n\nWhat it is: CVE-2026-49459 is a medium-severity cross-site scripting vulnerability in cure53 DOMPurify, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49459 exists.\n\nAffected packages and fixed versions:\n- dompurify (npm): affected all versions; fixed in 3.4.6\n- dompurify (npm): affected all versions; fixed in 3.4.6\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-2026-49459/ (Markdown: https://insights.sbomify.com/CVE-2026-49459/index.md)","id":"CVE-2026-49459","markdown":"https://insights.sbomify.com/CVE-2026-49459/index.md","name":"CVE-2026-49459","record":{"aliases":["DEBIAN-CVE-2026-49459","ECHO-e2af-3989-64e5","GHSA-r47g-fvhr-h676","MINI-594v-6x42-634f","MINI-5w8j-rhrr-6rm9","MINI-63fp-8prg-x3g2","MINI-663r-2q5m-r3g7","MINI-67rg-rfx4-2vj8","MINI-6c9f-pmg5-9xxc","MINI-8685-wfrm-6m24","MINI-c954-m78f-g8rw","MINI-chw9-86mc-58jm","MINI-h49j-w4c8-cfjc","MINI-hvj8-gpmp-3p98","MINI-p2mq-mhf3-phxm","MINI-vcjp-j2h4-7x35","MINI-vj6g-gpqp-qh2x","MINI-vmp3-2ccf-j5px","MINI-wq7x-cqcq-fj79","MINI-xwf9-4w76-7f9r","ROOT-APP-NPM-CVE-2026-49459","UBUNTU-CVE-2026-49459"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"JavaScript HTML sanitizer","requires_auth":"none","summary":"Attacker-controlled root DOM elements can retain event-handler attributes in IN_PLACE mode, enabling cross-site scripting attacks.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"dompurify","vendor":"cure53"}],"cvss":{"score":6.1,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/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"},{"id":"CWE-693","name":"Protection Mechanism Failure"},{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(root, { IN_PLACE: true }) could preserve event-handler attributes on an attacker-controlled \u003cform\u003e root when a descendant name clobbered properties checked by _isClobbered, because _forceRemove no-opped on the parent-less root and _sanitizeAttributes returned early. This issue is fixed in version 3.4.6.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"DOMPurify: IN_PLACE mode preserves attributes of a clobbered root element, allowing XSS via attacker-controlled root DOM","id":"CVE-2026-49459","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"pypdf: Inefficient decoding of FlateDecode PNG predictor streams","id":"CVE-2026-49460"},"packages":[{"ecosystem":"npm","fixed":["3.4.6"],"introduced":["0"],"last_affected":[],"package":"dompurify","purl":null,"source":"GHSA-r47g-fvhr-h676"},{"ecosystem":"npm","fixed":["3.4.6"],"introduced":["0"],"last_affected":[],"package":"dompurify","purl":"pkg:npm/dompurify","source":"GHSA-r47g-fvhr-h676"}],"prev":{"headline":"DOMPurify: Cross-realm IN_PLACE sanitization leaves executable markup intact via realm-bound `instanceof` checks","id":"CVE-2026-49458"},"products":["DOMPurify"],"published":"2026-07-14","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"}],"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["cure53"]},"summary":"Attacker-controlled root DOM elements can retain event-handler attributes in IN_PLACE mode, enabling cross-site scripting attacks.","url":"https://insights.sbomify.com/CVE-2026-49459/"}