{"id":"CVE-2021-3537","aliases":["GHSA-286v-pcf5-25rc"],"url":"https://o3.security/vulnerability/CVE-2021-3537","summary":"Nokogiri Implements libxml2 version vulnerable to null pointer dereferencing","details":"A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.","published":"2021-05-14T20:15:16.553Z","modified":"2026-08-07T16:57:24.943183Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"nokogiri","fixedVersion":"1.11.4"}],"fix":null,"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujul2022.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202107-05"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210625-0002/"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1956522"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuoct2021.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T16:57:24.943183Z"}}