{"id":"UBUNTU-CVE-2026-4751","details":"NULL Pointer Dereference vulnerability in tmate-io tmate.This issue affects tmate: before 2.4.0.","modified":"2026-05-20T16:26:59.496636431Z","published":"2026-03-24T06:16:00Z","upstream":["CVE-2026-4751"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-4751"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-4751"},{"type":"REPORT","url":"https://github.com/tmate-io/tmate/pull/328"}],"affected":[{"package":{"name":"tmate","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/tmate?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.10-2","1.8.10-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"tmate","binary_version":"1.8.10-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4751.json"}},{"package":{"name":"tmate","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/tmate?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"tmate","binary_version":"2.2.1-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4751.json"}},{"package":{"name":"tmate","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tmate?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1-1build3","2.2.1-1build4","2.3.0-1","2.4.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.0-1","binary_name":"tmate"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4751.json"}},{"package":{"name":"tmate","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/tmate?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.0-2","binary_name":"tmate"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4751.json"}},{"package":{"name":"tmate","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/tmate?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.0-2build2","2.4.0-2build3"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.0-2build3","binary_name":"tmate"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4751.json"}},{"package":{"name":"tmate","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/tmate?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.0-3"],"ecosystem_specific":{"binaries":[{"binary_name":"tmate","binary_version":"2.4.0-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4751.json"}},{"package":{"name":"tmate","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/tmate?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.0-3","2.4.0-3build1"],"ecosystem_specific":{"binaries":[{"binary_name":"tmate","binary_version":"2.4.0-3build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-4751.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:L"},{"type":"Ubuntu","score":"medium"}]}