{"id":"UBUNTU-CVE-2026-8177","details":"XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences. A node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory. Any Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.","modified":"2026-06-30T18:18:14.256183652Z","published":"2026-05-10T21:16:00Z","upstream":["CVE-2026-8177"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-8177"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-8177"},{"type":"REPORT","url":"https://lists.security.metacpan.org/cve-announce/msg/39920366/"},{"type":"REPORT","url":"https://github.com/cpan-authors/XML-LibXML/issues/146"},{"type":"REPORT","url":"https://github.com/cpan-authors/XML-LibXML/pull/149"}],"affected":[{"package":{"name":"libxml-libxml-perl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libxml-libxml-perl?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0116+dfsg-5","2.0122+dfsg-1","2.0123+dfsg-1","2.0123+dfsg-1build1","2.0123+dfsg-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0123+dfsg-1ubuntu0.1","binary_name":"libxml-libxml-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8177.json"}},{"package":{"name":"libxml-libxml-perl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libxml-libxml-perl?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0128+dfsg-3","2.0128+dfsg-5"],"ecosystem_specific":{"binaries":[{"binary_name":"libxml-libxml-perl","binary_version":"2.0128+dfsg-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8177.json"}},{"package":{"name":"libxml-libxml-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libxml-libxml-perl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0134+dfsg-1","2.0134+dfsg-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0134+dfsg-1build1","binary_name":"libxml-libxml-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8177.json"}},{"package":{"name":"libxml-libxml-perl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libxml-libxml-perl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0134+dfsg-2build1","2.0134+dfsg-2build2","2.0207+dfsg-2","2.0207+dfsg+really+2.0134-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0207+dfsg+really+2.0134-1","binary_name":"libxml-libxml-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8177.json"}},{"package":{"name":"libxml-libxml-perl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libxml-libxml-perl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0207+dfsg+really+2.0134-1build1","2.0207+dfsg+really+2.0134-1build2","2.0207+dfsg+really+2.0134-1build3","2.0207+dfsg+really+2.0134-1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"libxml-libxml-perl","binary_version":"2.0207+dfsg+really+2.0134-1build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8177.json"}},{"package":{"name":"libxml-libxml-perl","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libxml-libxml-perl?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0207+dfsg+really+2.0134-5build1","2.0207+dfsg+really+2.0207-0ubuntu4","2.0207+dfsg+really+2.0207-0ubuntu5","2.0207+dfsg+really+2.0207-0ubuntu6"],"ecosystem_specific":{"binaries":[{"binary_name":"libxml-libxml-perl","binary_version":"2.0207+dfsg+really+2.0207-0ubuntu6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8177.json"}},{"package":{"name":"libxml-libxml-perl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libxml-libxml-perl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0207+dfsg+really+2.0207-0ubuntu6","2.0207+dfsg+really+2.0207-0ubuntu7"],"ecosystem_specific":{"binaries":[{"binary_name":"libxml-libxml-perl","binary_version":"2.0207+dfsg+really+2.0207-0ubuntu7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8177.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":"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"}]}