{"id":"CVE-2016-9909","details":"The serializer in html5lib before 0.99999999 might allow remote attackers to conduct cross-site scripting (XSS) attacks by leveraging mishandling of the \u003c (less than) character in attribute values.","aliases":["GHSA-v9v9-xffq-rwr4","PYSEC-2017-14"],"modified":"2026-04-16T01:47:13.636243035Z","published":"2017-02-22T16:59:00.380Z","references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2016/12/06/5"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2016/12/08/8"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/95132"},{"type":"ADVISORY","url":"https://github.com/html5lib/html5lib-python/issues/11"},{"type":"ADVISORY","url":"https://github.com/html5lib/html5lib-python/issues/12"},{"type":"ADVISORY","url":"https://html5lib.readthedocs.io/en/latest/changes.html#b9"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2016/12/06/5"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2016/12/08/8"},{"type":"FIX","url":"https://github.com/html5lib/html5lib-python/commit/9b8d8eb5afbc066b7fac9390f5ec75e5e8a7cab7"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2016/12/06/5"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2016/12/08/8"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/html5lib/html5lib-python","events":[{"introduced":"0"},{"fixed":"9b8d8eb5afbc066b7fac9390f5ec75e5e8a7cab7"}]}],"versions":["0.10ish","0.11.1ish","0.11ish","0.90","0.95","0.99","0.999","0.9999","0.99999","0.999999","0.9999999","0.9ish","1.0b1","1.0b2","1.0b3"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2016-9909.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}