{"id":"UBUNTU-CVE-2026-34601","details":"xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In xmldom versions 0.6.0 and prior and @xmldom/xmldom prior to versions 0.8.12 and 0.9.9, xmldom/xmldom allows attacker-controlled strings containing the CDATA terminator ]]\u003e to be inserted into a CDATASection node. During serialization, XMLSerializer emitted the CDATA content verbatim without rejecting or safely splitting the terminator. As a result, data intended to remain text-only became active XML markup in the serialized output, enabling XML structure injection and downstream business-logic manipulation. This issue has been patched in xmldom version 0.6.0 and @xmldom/xmldom versions 0.8.12 and 0.9.9.","modified":"2026-06-30T18:17:58.034677066Z","published":"2026-04-02T18:16:00Z","upstream":["CVE-2026-34601"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-34601"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-34601"}],"affected":[{"package":{"name":"node-xmldom","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-xmldom?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.1.27+ds-1","0.1.27+ds-1+deb10u2build0.20.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-xmldom","binary_version":"0.1.27+ds-1+deb10u2build0.20.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34601.json"}},{"package":{"name":"node-xmldom","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-xmldom?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.5.0-1","0.7.3-1","0.7.5-1","0.7.5-1ubuntu0.22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-xmldom","binary_version":"0.7.5-1ubuntu0.22.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34601.json"}},{"package":{"name":"node-xmldom","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-xmldom?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.6-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-xmldom","binary_version":"0.8.6-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34601.json"}},{"package":{"name":"node-xmldom","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/node-xmldom?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.6-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-xmldom","binary_version":"0.9.6-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34601.json"}},{"package":{"name":"node-xmldom","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-xmldom?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.6-1","0.9.8-1","0.9.8-2"],"ecosystem_specific":{"binaries":[{"binary_name":"node-xmldom","binary_version":"0.9.8-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-34601.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:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}