{"id":"UBUNTU-CVE-2026-13006","details":"ACE vulnerability in conditional configuration file processing  by QOS.CH logback-core up to and including version 1.5.36 in Java applications, allows an attacker to execute arbitrary code circumventing existing protections against CVE-2025-11226 by compromising an existing logback configuration file or by injecting an environment variable before program execution. A successful attack requires the presence of Janino library to be present on the user's class path. In addition, the attacker must  have write access to a configuration file. Alternatively, the attacker could inject a malicious environment variable pointing to a malicious configuration file. In both cases, the attack requires existing privilege. Please note that in logack version 1.5.37 conditional processing using Janino was removed.","modified":"2026-07-09T17:15:13.962240266Z","published":"2026-06-24T07:16:00Z","upstream":["CVE-2026-13006"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-13006"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-13006"},{"type":"REPORT","url":"https://logback.qos.ch/news.html#1.5.35"}],"affected":[{"package":{"name":"logback","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/logback?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.1.3-2","1:1.1.3-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:1.1.3-2ubuntu0.1~esm1","binary_name":"liblogback-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13006.json"}},{"package":{"name":"logback","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/logback?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.1.9-4","1:1.1.9-5","1:1.2.3-2","1:1.2.3-2ubuntu1~18.04.1","1:1.2.3-2ubuntu1~18.04.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:1.2.3-2ubuntu1~18.04.1+esm1","binary_name":"liblogback-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13006.json"}},{"package":{"name":"logback","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/logback?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.2.3-5","1:1.2.3-5ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"liblogback-java","binary_version":"1:1.2.3-5ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13006.json"}},{"package":{"name":"logback","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/logback?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.2.3-6","1:1.2.7-1","1:1.2.8-1","1:1.2.9-1","1:1.2.10-1","1:1.2.10-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"liblogback-java","binary_version":"1:1.2.10-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13006.json"}},{"package":{"name":"logback","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/logback?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.2.11-3","1:1.2.11-4","1:1.2.11-5"],"ecosystem_specific":{"binaries":[{"binary_version":"1:1.2.11-5","binary_name":"liblogback-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13006.json"}},{"package":{"name":"logback","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/logback?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.2.11-6"],"ecosystem_specific":{"binaries":[{"binary_name":"liblogback-java","binary_version":"1:1.2.11-6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13006.json"}},{"package":{"name":"logback","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/logback?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:1.2.11-6","1:1.2.11-6build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:1.2.11-6build1","binary_name":"liblogback-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13006.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/S:P/AU:N/RE:M/U:Green"},{"type":"Ubuntu","score":"medium"}]}