{"answers":{"affected":"2 open source packages ship an affected version, including dompurify. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-65912 in the wild and no public exploit code.","fix":"Upgrade dompurify to 3.3.2 or later.","what":"CVE-2026-65912 is a medium-severity cross-site scripting vulnerability in cure53 DOMPurify, published on 23 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-2026-65912 and fix it if it is affected.\n\nWhat it is: CVE-2026-65912 is a medium-severity cross-site scripting vulnerability in cure53 DOMPurify, published on 23 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: There is no known exploitation of CVE-2026-65912 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- dompurify (npm): affected all versions; fixed in 3.3.2\n- dompurify (npm): affected all versions; fixed in 3.3.2\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-2026-65912/ (Markdown: https://insights.sbomify.com/CVE-2026-65912/index.md)","id":"CVE-2026-65912","markdown":"https://insights.sbomify.com/CVE-2026-65912/index.md","name":"CVE-2026-65912","record":{"aliases":["CLEANSTART-2026-BC33249","CLSA-2026-1784769607","CLSA-2026-1784856415","DEBIAN-CVE-2026-65912","ECHO-6f5f-72eb-f9a6","GHSA-cjmm-f4jc-qw8r","MINI-3m7f-x4hp-5w76","MINI-58pw-8rwj-x668","MINI-5q2m-3665-3475","MINI-7qwh-33g6-c72m","MINI-gjv8-m3qx-h8f5","MINI-pffr-95vv-wmwx","MINI-rgjf-mjr5-fjh4","MINI-rh3j-934j-j8gp","MINI-wxh5-r2pc-x4cf","ROOT-APP-NPM-CVE-2026-65912","ROOT-APP-NPM-GHSA-cjmm-f4jc-qw8r","UBUNTU-CVE-2026-65912"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"JavaScript sanitization library","requires_auth":"none","summary":"Attackers can bypass URI validation in DOMPurify using specific predicate functions to inject JavaScript, leading to DOM-based XSS.","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:N/UI:A/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 3.3.2 contains a URI validation bypass vulnerability when ADD_ATTR is provided as a predicate function via EXTRA_ELEMENT_HANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe protocols like javascript: to survive sanitization and execute as DOM-based XSS when the link is activated.","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 3.3.2 URI Validation Bypass via ADD_ATTR","id":"CVE-2026-65912","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 3.3.2 Prototype Pollution via USE_PROFILES","id":"CVE-2026-65913"},"packages":[{"ecosystem":"npm","fixed":["3.3.2"],"introduced":["0"],"last_affected":[],"package":"dompurify","purl":null,"source":"GHSA-cjmm-f4jc-qw8r"},{"ecosystem":"npm","fixed":["3.3.2"],"introduced":["0"],"last_affected":[],"package":"dompurify","purl":"pkg:npm/dompurify","source":"GHSA-cjmm-f4jc-qw8r"}],"prev":{"headline":"DOMPurify before 3.4.0 XSS via ADD_ATTR/ADD_TAGS State Leakage","id":"CVE-2026-65911"},"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 bypass URI validation in DOMPurify using specific predicate functions to inject JavaScript, leading to DOM-based XSS.","url":"https://insights.sbomify.com/CVE-2026-65912/"}