{"id":"UBUNTU-CVE-2026-66141","details":"Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.","modified":"2026-08-19T13:32:33.413517325Z","published":"2026-07-24T05:16:00Z","related":["USN-8590-1"],"upstream":["CVE-2026-66141"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-66141"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-66141"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2026/07/22/9"},{"type":"REPORT","url":"https://www.exim.org/static/doc/security/EXIM-Security-2026-06-22.3/EXIM-Security-2026-06-22.3.txt"},{"type":"REPORT","url":"https://openwall.com/lists/oss-security/2026/07/22/9"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8590-1"}],"affected":[{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/exim4?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.80-7ubuntu3","4.80-7ubuntu4","4.80-9ubuntu1","4.80-9ubuntu2","4.82-3ubuntu1","4.82-3ubuntu2","4.82-3ubuntu2.1","4.82-3ubuntu2.2","4.82-3ubuntu2.3","4.82-3ubuntu2.4","4.82-3ubuntu2.4+esm1","4.82-3ubuntu2.4+esm2","4.82-3ubuntu2.4+esm3","4.82-3ubuntu2.4+esm4","4.82-3ubuntu2.4+esm6","4.82-3ubuntu2.4+esm7","4.82-3ubuntu2.4+esm8","4.82-3ubuntu2.4+esm9"],"ecosystem_specific":{"binaries":[{"binary_version":"4.82-3ubuntu2.4+esm9","binary_name":"exim4"},{"binary_name":"exim4-base","binary_version":"4.82-3ubuntu2.4+esm9"},{"binary_name":"exim4-config","binary_version":"4.82-3ubuntu2.4+esm9"},{"binary_version":"4.82-3ubuntu2.4+esm9","binary_name":"exim4-daemon-heavy"},{"binary_name":"exim4-daemon-light","binary_version":"4.82-3ubuntu2.4+esm9"},{"binary_version":"4.82-3ubuntu2.4+esm9","binary_name":"eximon4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66141.json"}},{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/exim4?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.86-3ubuntu1","4.86-7ubuntu1","4.86-7ubuntu2","4.86-7ubuntu3","4.86.2-2ubuntu1","4.86.2-2ubuntu2","4.86.2-2ubuntu2.1","4.86.2-2ubuntu2.2","4.86.2-2ubuntu2.3","4.86.2-2ubuntu2.4","4.86.2-2ubuntu2.5","4.86.2-2ubuntu2.6","4.86.2-2ubuntu2.6+esm1","4.86.2-2ubuntu2.6+esm2","4.86.2-2ubuntu2.6+esm4","4.86.2-2ubuntu2.6+esm5","4.86.2-2ubuntu2.6+esm6","4.86.2-2ubuntu2.6+esm7","4.86.2-2ubuntu2.6+esm8","4.86.2-2ubuntu2.6+esm9"],"ecosystem_specific":{"binaries":[{"binary_name":"exim4","binary_version":"4.86.2-2ubuntu2.6+esm9"},{"binary_name":"exim4-base","binary_version":"4.86.2-2ubuntu2.6+esm9"},{"binary_name":"exim4-config","binary_version":"4.86.2-2ubuntu2.6+esm9"},{"binary_name":"exim4-daemon-heavy","binary_version":"4.86.2-2ubuntu2.6+esm9"},{"binary_name":"exim4-daemon-light","binary_version":"4.86.2-2ubuntu2.6+esm9"},{"binary_version":"4.86.2-2ubuntu2.6+esm9","binary_name":"eximon4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66141.json"}},{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/exim4?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.89-5ubuntu1","4.89-9ubuntu1","4.89-9ubuntu2","4.89-9ubuntu3","4.89-9ubuntu4","4.90.1-1ubuntu1","4.90.1-1ubuntu1.1","4.90.1-1ubuntu1.2","4.90.1-1ubuntu1.3","4.90.1-1ubuntu1.4","4.90.1-1ubuntu1.5","4.90.1-1ubuntu1.8","4.90.1-1ubuntu1.9","4.90.1-1ubuntu1.10","4.90.1-1ubuntu1.10+esm1","4.90.1-1ubuntu1.10+esm2","4.90.1-1ubuntu1.10+esm3","4.90.1-1ubuntu1.10+esm4","4.90.1-1ubuntu1.10+esm5","4.90.1-1ubuntu1.10+esm6"],"ecosystem_specific":{"binaries":[{"binary_name":"exim4","binary_version":"4.90.1-1ubuntu1.10+esm6"},{"binary_version":"4.90.1-1ubuntu1.10+esm6","binary_name":"exim4-base"},{"binary_name":"exim4-config","binary_version":"4.90.1-1ubuntu1.10+esm6"},{"binary_name":"exim4-daemon-heavy","binary_version":"4.90.1-1ubuntu1.10+esm6"},{"binary_name":"exim4-daemon-light","binary_version":"4.90.1-1ubuntu1.10+esm6"},{"binary_name":"eximon4","binary_version":"4.90.1-1ubuntu1.10+esm6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-66141.json"}},{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/exim4?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.92.1-1ubuntu3","4.92.1-1ubuntu4","4.93~RC2-1ubuntu1","4.93-9ubuntu1","4.93-11ubuntu1","4.93-12ubuntu1","4.93-13ubuntu1","4.93-13ubuntu1.1","4.93-13ubuntu1.5","4.93-13ubuntu1.6","4.93-13ubuntu1.7","4.93-13ubuntu1.8","4.93-13ubuntu1.9","4.93-13ubuntu1.10","4.93-13ubuntu1.11","4.93-13ubuntu1.12","4.93-13ubuntu1.12+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"exim4","binary_version":"4.93-13ubuntu1.12+esm1"},{"binary_name":"exim4-base","binary_version":"4.93-13u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