{"id":"UBUNTU-CVE-2026-114605","details":"dnspython is a DNS toolkit for Python. Prior to 2.9.0, dns.name.from_wire_parser follows attacker-controlled DNS compression pointer chains without a hop limit. A malicious DNS wire-format message can force excessive pointer traversal during name decompression, causing high CPU use, application degradation, or denial of service in applications that process untrusted DNS messages. This issue is fixed in version 2.9.0.","modified":"2026-10-27T04:17:42.715018961Z","published":"2026-10-26T00:00:00Z","upstream":["CVE-2026-114605"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-114605"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-114605"},{"type":"REPORT","url":"https://github.com/rthalley/dnspython/commit/b485e460c266540a1a09ca6d8d1d7b685b1d3023"},{"type":"REPORT","url":"https://github.com/rthalley/dnspython/releases/tag/v2.9.0"},{"type":"REPORT","url":"https://github.com/rthalley/dnspython/security/advisories/GHSA-45c3-73f7-pv4m"}],"affected":[{"package":{"name":"dnspython","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/dnspython?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.11.0-1","1.11.1-1","1.11.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-dnspython","binary_version":"1.11.1-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-114605.json"}},{"package":{"name":"dnspython","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/dnspython?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-dnspython","binary_version":"1.12.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-114605.json"}},{"package":{"name":"dnspython","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/dnspython?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.15.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.15.0-1","binary_name":"python-dnspython"},{"binary_name":"python3-dnspython","binary_version":"1.15.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-114605.json"}},{"package":{"name":"dnspython","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/dnspython?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.0-1","1.16.0-1build1","1.16.0-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-dnspython","binary_version":"1.16.0-1ubuntu1"},{"binary_name":"python3-dnspython","binary_version":"1.16.0-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-114605.json"}},{"package":{"name":"dnspython","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/dnspython?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0+really1.16.0-2ubuntu2","2.0.0+really1.16.0-2ubuntu3","2.1.0-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.1.0-1ubuntu1","binary_name":"python3-dnspython"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-114605.json"}},{"package":{"name":"dnspython","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/dnspython?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.1-1ubuntu2","2.4.2-1ubuntu1","2.6.1-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-dnspython","binary_version":"2.6.1-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-114605.json"}},{"package":{"name":"dnspython","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/dnspython?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.8.0-1ubuntu1","2.8.0-3ubuntu1","2.8.0-5"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-dnspython","binary_version":"2.8.0-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-114605.json"}},{"package":{"name":"dnspython","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/dnspython?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.0-1ubuntu1","2.7.0-1ubuntu2","2.8.0-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-dnspython","binary_version":"2.8.0-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-114605.json"}}],"schema_version":"1.9.2","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"}]}