{"cve":"CVE-2021-3537","nvd":{"published":"2021-05-14T20:15:16.553","modified":"2026-10-14T10:17:45.043","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9},"cwes":["CWE-476"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1956522","https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/","https://security.gentoo.org/glsa/202107-05"],"products":["debian:debian_linux","fedoraproject:fedora","netapp:active_iq_unified_manager","netapp:clustered_data_ontap","netapp:clustered_data_ontap_antivirus_connector","netapp:hci_h410c_firmware","netapp:manageability_software_development_kit","netapp:ontap_select_deploy_administration_utility","netapp:snapdrive","oracle:communications_cloud_native_core_network_function_cloud_native_environment","oracle:enterprise_manager_base_platform","oracle:enterprise_manager_ops_center","oracle:mysql_workbench","oracle:openjdk","oracle:peoplesoft_enterprise_peopletools","oracle:real_user_experience_insight","redhat:enterprise_linux","redhat:jboss_core_services","xmlsoft:libxml2"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-3537","score":0.03596,"percentile":0.89367,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-286v-pcf5-25rc","url":"https://osv.dev/vulnerability/GHSA-286v-pcf5-25rc","summary":"Nokogiri Implements libxml2 version vulnerable to null pointer dereferencing","modified":"2024-02-20T05:19:04.908048Z","packages":[{"ecosystem":"RubyGems","name":"nokogiri","purl":"pkg:gem/nokogiri","ranges":["<1.11.4"],"fixed":["1.11.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}