{"id":"USN-8477-1","summary":"tar vulnerability","details":"It was discovered that tar incorrectly handled certain crafted archive files.\nAn attacker could possibly use this to inject hidden files with\nattacker-controlled content, bypassing pre-extraction inspection mechanisms.","modified":"2026-06-26T14:59:24.298942091Z","published":"2026-06-25T20:57:32Z","related":["UBUNTU-CVE-2026-5704"],"upstream":["UBUNTU-CVE-2026-5704"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8477-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-5704"}],"affected":[{"package":{"name":"tar","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/tar?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.27.1-1ubuntu0.1+esm5"}]}],"versions":["1.26+dfsg-8","1.27-3","1.27-4","1.27.1-1","1.27.1-1ubuntu0.1","1.27.1-1ubuntu0.1+esm1","1.27.1-1ubuntu0.1+esm2","1.27.1-1ubuntu0.1+esm3","1.27.1-1ubuntu0.1+esm4"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"tar","binary_version":"1.27.1-1ubuntu0.1+esm5"},{"binary_name":"tar-scripts","binary_version":"1.27.1-1ubuntu0.1+esm5"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-5704"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8477-1.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/tar?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28-2.1ubuntu0.2+esm4"}]}],"versions":["1.27.1-2","1.28-2ubuntu1","1.28-2.1","1.28-2.1ubuntu0.1","1.28-2.1ubuntu0.2","1.28-2.1ubuntu0.2+esm1","1.28-2.1ubuntu0.2+esm2","1.28-2.1ubuntu0.2+esm3"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"tar","binary_version":"1.28-2.1ubuntu0.2+esm4"},{"binary_name":"tar-scripts","binary_version":"1.28-2.1ubuntu0.2+esm4"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2026-5704","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8477-1.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/tar?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.29b-2ubuntu0.4+esm2"}]}],"versions":["1.29b-2","1.29b-2ubuntu0.1","1.29b-2ubuntu0.2","1.29b-2ubuntu0.3","1.29b-2ubuntu0.4","1.29b-2ubuntu0.4+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"tar","binary_version":"1.29b-2ubuntu0.4+esm2"},{"binary_name":"tar-scripts","binary_version":"1.29b-2ubuntu0.4+esm2"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-5704"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8477-1.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/tar?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.30+dfsg-7ubuntu0.20.04.4+esm1"}]}],"versions":["1.30+dfsg-6","1.30+dfsg-7","1.30+dfsg-7ubuntu0.20.04.1","1.30+dfsg-7ubuntu0.20.04.2","1.30+dfsg-7ubuntu0.20.04.3","1.30+dfsg-7ubuntu0.20.04.4"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"tar","binary_version":"1.30+dfsg-7ubuntu0.20.04.4+esm1"},{"binary_name":"tar-scripts","binary_version":"1.30+dfsg-7ubuntu0.20.04.4+esm1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-5704"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8477-1.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/tar?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.34+dfsg-1ubuntu0.1.22.04.3"}]}],"versions":["1.34+dfsg-1build1","1.34+dfsg-1build2","1.34+dfsg-1build3","1.34+dfsg-1ubuntu0.1.22.04.1","1.34+dfsg-1ubuntu0.1.22.04.2"],"ecosystem_specific":{"availability":"No subscription 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required","binaries":[{"binary_name":"tar","binary_version":"1.35+dfsg-3ubuntu0.1"},{"binary_name":"tar-scripts","binary_version":"1.35+dfsg-3ubuntu0.1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-5704"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8477-1.json"}},{"package":{"name":"tar","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/tar?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.35+dfsg-4ubuntu0.1"}]}],"versions":["1.35+dfsg-3.1build1","1.35+dfsg-3.1build2","1.35+dfsg-4"],"ecosystem_specific":{"availability":"No subscription 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