{"id":"UBUNTU-CVE-2026-13401","details":"XML::Bare versions through 0.53 for Perl will hang in an infinite loop when parsing malformed attributes. The parserc_parse function never advances the attribute-parse state cursor on certain malformed attribute forms, looping forever. Nameless attributes such as \"\u003ca ='c'\u003e\" or unbalanced quotes \"\u003ca b='''''''c'\u003e\" can trigger this condition.","modified":"2026-07-29T07:53:20Z","published":"2026-07-16T17:16:00Z","upstream":["CVE-2026-13401"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-13401"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-13401"},{"type":"REPORT","url":"https://lists.security.metacpan.org/cve-announce/msg/41876829/"},{"type":"REPORT","url":"https://github.com/nanoscopic/perl-XML-Bare/pull/2"},{"type":"REPORT","url":"https://security.metacpan.org/patches/X/XML-Bare/0.53/CVE-2026-13401-r1.patch"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2026/07/16/2"}],"affected":[{"package":{"name":"libxml-bare-perl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libxml-bare-perl?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.53-1build1","0.53-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"libxml-bare-perl","binary_version":"0.53-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13401.json"}},{"package":{"name":"libxml-bare-perl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libxml-bare-perl?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.53-1build4"],"ecosystem_specific":{"binaries":[{"binary_version":"0.53-1build4","binary_name":"libxml-bare-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13401.json"}},{"package":{"name":"libxml-bare-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libxml-bare-perl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.53-1build5","0.53-1build6"],"ecosystem_specific":{"binaries":[{"binary_version":"0.53-1build6","binary_name":"libxml-bare-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13401.json"}},{"package":{"name":"libxml-bare-perl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libxml-bare-perl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.53-1build7","0.53-1build8"],"ecosystem_specific":{"binaries":[{"binary_name":"libxml-bare-perl","binary_version":"0.53-1build8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13401.json"}},{"package":{"name":"libxml-bare-perl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libxml-bare-perl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.53-2build1","0.53-2build2","0.53-2build3","0.53-2build4"],"ecosystem_specific":{"binaries":[{"binary_name":"libxml-bare-perl","binary_version":"0.53-2build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13401.json"}},{"package":{"name":"libxml-bare-perl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libxml-bare-perl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.53-4build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libxml-bare-perl","binary_version":"0.53-4build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13401.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}