{"answers":{"affected":"2 open source packages ship an affected version, including typo3/html-sanitizer.","exploited":"There is no known exploitation of CVE-2026-47345 in the wild and no public exploit code.","fix":"Upgrade typo3/html-sanitizer to 2.3.2 or later.","what":"CVE-2026-47345 is a medium-severity cross-site scripting vulnerability in TYPO3 HTML Sanitizer, published on 8 Jun 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-2026-47345 and fix it if it is affected.\n\nWhat it is: CVE-2026-47345 is a medium-severity cross-site scripting vulnerability in TYPO3 HTML Sanitizer, published on 8 Jun 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-2026-47345 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- typo3/html-sanitizer (Packagist): affected all versions; fixed in 2.3.2\n- typo3/html-sanitizer (Packagist): affected all versions; fixed in 2.3.2\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-2026-47345/ (Markdown: https://insights.sbomify.com/CVE-2026-47345/index.md)","id":"CVE-2026-47345","markdown":"https://insights.sbomify.com/CVE-2026-47345/index.md","name":"CVE-2026-47345","record":{"aliases":["GHSA-p5j5-4j3q-8mq8"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"TYPO3 HTML Sanitizer","requires_auth":"low_privilege","summary":"An attacker can bypass XSS prevention in the TYPO3 HTML Sanitizer library by exploiting incorrect namespace attribute encoding during serialization.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"TYPO3","cpe":[],"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":"Namespace attributes are not encoded correctly during HTML serialization. This allows bypassing the cross-site scripting prevention mechanism of typo3/html-sanitizer before version 2.3.2.","ecosystems":["Packagist"],"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":"TYPO3 HTML Sanitizer allows Cross-Site Scripting","id":"CVE-2026-47345","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"TYPO3 CMS - Broken Access Control in Form Framework","id":"CVE-2026-47346"},"packages":[{"ecosystem":"Packagist","fixed":["2.3.2"],"introduced":["0"],"last_affected":[],"package":"typo3/html-sanitizer","purl":null,"source":"GHSA-p5j5-4j3q-8mq8"},{"ecosystem":"Packagist","fixed":["2.3.2"],"introduced":["0"],"last_affected":[],"package":"typo3/html-sanitizer","purl":"pkg:composer/typo3/html-sanitizer","source":"GHSA-p5j5-4j3q-8mq8"}],"prev":{"headline":"TYPO3 HTML Sanitizer allows Cross-Site Scripting","id":"CVE-2026-47344"},"products":["HTML Sanitizer"],"published":"2026-06-08","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":"2026-06-08","vendors":["TYPO3"]},"summary":"An attacker can bypass XSS prevention in the TYPO3 HTML Sanitizer library by exploiting incorrect namespace attribute encoding during serialization.","url":"https://insights.sbomify.com/CVE-2026-47345/"}