{"id":"UBUNTU-CVE-2026-8450","details":"HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file(). send_file() opens its string argument with Perl's 2-arg open(). The 2-arg form interprets magic prefixes: '| cmd' and 'cmd |' open a pipe to a subprocess, '\u003e path' and '\u003e\u003e path' open the path for write or append. Untrusted input passed to send_file() can run OS commands at the daemon process UID. The read-pipe form ('cmd |') also leaks subprocess stdout into the HTTP response body. The write-mode forms can create or truncate files at attacker chosen paths.","modified":"2026-06-30T18:18:39.641706220Z","published":"2026-05-27T05:16:00Z","related":["USN-8419-1"],"upstream":["CVE-2026-8450"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-8450"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-8450"},{"type":"REPORT","url":"https://lists.security.metacpan.org/cve-announce/msg/40435207/"},{"type":"REPORT","url":"https://github.com/libwww-perl/HTTP-Daemon/pull/89"},{"type":"REPORT","url":"https://metacpan.org/release/OALDERS/HTTP-Daemon-6.17/changes"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2026/05/27/5"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8419-1"}],"affected":[{"package":{"name":"libhttp-daemon-perl","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libhttp-daemon-perl?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.01-1ubuntu0.14.04~esm2"}]}],"versions":["6.01-1","6.01-1ubuntu0.14.04~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"libhttp-daemon-perl","binary_version":"6.01-1ubuntu0.14.04~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8450.json"}},{"package":{"name":"libhttp-daemon-perl","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libhttp-daemon-perl?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.01-1ubuntu0.16.04~esm2"}]}],"versions":["6.01-1","6.01-1ubuntu0.16.04~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"libhttp-daemon-perl","binary_version":"6.01-1ubuntu0.16.04~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8450.json"}},{"package":{"name":"libhttp-daemon-perl","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libhttp-daemon-perl?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.01-1ubuntu0.1+esm1"}]}],"versions":["6.01-1","6.01-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttp-daemon-perl","binary_version":"6.01-1ubuntu0.1+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8450.json"}},{"package":{"name":"libhttp-daemon-perl","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/libhttp-daemon-perl?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.06-1ubuntu0.1+esm1"}]}],"versions":["6.04-1","6.06-1","6.06-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttp-daemon-perl","binary_version":"6.06-1ubuntu0.1+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8450.json"}},{"package":{"name":"libhttp-daemon-perl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libhttp-daemon-perl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.13-1ubuntu0.2"}]}],"versions":["6.12-1","6.13-1","6.13-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttp-daemon-perl","binary_version":"6.13-1ubuntu0.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8450.json"}},{"package":{"name":"libhttp-daemon-perl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libhttp-daemon-perl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.16-1ubuntu0.24.04.1"}]}],"versions":["6.16-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libhttp-daemon-perl","binary_version":"6.16-1ubuntu0.24.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8450.json"}},{"package":{"name":"libhttp-daemon-perl","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libhttp-daemon-perl?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.16-1ubuntu0.25.10.1"}]}],"versions":["6.16-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttp-daemon-perl","binary_version":"6.16-1ubuntu0.25.10.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8450.json"}},{"package":{"name":"libhttp-daemon-perl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libhttp-daemon-perl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.16-1ubuntu0.26.04.1"}]}],"versions":["6.16-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttp-daemon-perl","binary_version":"6.16-1ubuntu0.26.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8450.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:H/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}