{"id":"CVE-2026-47345","aliases":["EUVD-2026-35192","GHSA-p5j5-4j3q-8mq8"],"status":"published","title":"TYPO3 HTML Sanitizer allows Cross-Site Scripting","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.","severity":{"version":"4.0","score":5.1,"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00475,"percentile":0.41391,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-06-08T19:04:08Z","modified":"2026-10-28T02:30:44Z","fixes":[{"ecosystem":"Packagist","package":"typo3/html-sanitizer","fixed_in":["2.3.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"typo3/html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.2"}]}]},{"source":"osv","ecosystem":"Packagist","package":"typo3/html-sanitizer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.2"}]}],"versions":["v1.0.0","v1.0.1","v1.0.2","v1.0.3","v1.0.4","v1.0.5","v1.0.6","v1.0.7","v1.5.0","v1.5.1","v1.5.2","v1.5.3","v2.0.0","v2.0.1","v2.0.10","v2.0.11","v2.0.12","v2.0.13","v2.0.14","v2.0.15","v2.0.16","v2.0.2","v2.0.3","v2.0.4","v2.0.5","v2.0.6","v2.0.7","v2.0.8","v2.0.9","v2.1.0","v2.1.1","v2.1.2","v2.1.3","v2.1.4","v2.2.0","v2.3.0","v2.3.1"]}],"products":[{"vendor":"typo3","product":"html sanitizer"}],"references":[{"url":"https://typo3.org/security/advisory/typo3-core-sa-2026-006","tags":["vendor-advisory","advisory","web"]},{"url":"https://github.com/TYPO3/html-sanitizer/commit/8b5d0be44ded457ca993ec9ca93d859941c63764","tags":["patch","fix","web"]},{"url":"https://github.com/TYPO3/html-sanitizer/security/advisories/GHSA-p5j5-4j3q-8mq8","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47345","tags":["advisory"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/html-sanitizer/CVE-2026-47345.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-p5j5-4j3q-8mq8"},{"url":"https://packagist.org","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47345.json","tags":["advisory"]},{"url":"https://github.com/TYPO3/html-sanitizer","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-47345","title":"TYPO3 HTML Sanitizer allows Cross-Site Scripting","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.","status":"published","published":"2026-06-08T19:04:08.337Z","modified":"2026-06-08T19:49:59.995Z","cvss":[{"version":"4.0","score":5.1,"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","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:36:40.478484Z"}],"euvd":[{"id":"EUVD-2026-35192","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.","status":"published","published":"2026-06-08T19:04:08Z","modified":"2026-06-08T19:49:59Z","cvss":[{"version":"4.0","score":5.1,"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","level":"medium"}],"updated_at":"2026-11-02T18:20:48.375828Z"}],"ghsa":[{"id":"GHSA-p5j5-4j3q-8mq8","title":"TYPO3 HTML Sanitizer allows Cross-site Scripting","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.\n\nCredits to Doyensec in collaboration with Claude and Anthropic Research for reporting this vulnerability.","status":"published","published":"2026-06-12T20:07:46Z","modified":"2026-06-12T20:07:48Z","cvss":[{"version":"4.0","score":5.1,"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","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:40:27.329706Z"}],"nvd":[{"id":"CVE-2026-47345","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.","status":"published","published":"2026-06-08T20:17:01.743Z","modified":"2026-07-23T08:10:00.137Z","cvss":[{"version":"4.0","score":5.1,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:22.73178Z"}],"osv":[{"id":"CVE-2026-47345","title":"TYPO3 HTML Sanitizer allows Cross-Site Scripting","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.","status":"published","published":"2026-06-08T19:04:08.337Z","modified":"2026-10-28T02:30:44.058242426Z","cvss":[{"version":"4.0","score":5.1,"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","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:06.231145Z"},{"id":"GHSA-p5j5-4j3q-8mq8","title":"TYPO3 HTML Sanitizer allows Cross-site Scripting","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.\n\nCredits to Doyensec in collaboration with Claude and Anthropic Research for reporting this vulnerability.","status":"published","published":"2026-06-12T20:07:46Z","modified":"2026-09-10T03:51:09.236719897Z","cvss":[{"version":"4.0","score":5.1,"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","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:52.534897Z"}]}}