{"id":"CVE-2026-63293","aliases":["DEBIAN-CVE-2026-63293","EUVD-2026-57540","GHSA-j825-cg34-5fr5","UBUNTU-CVE-2026-63293","openSUSE-SU-2026:21788-1"],"status":"published","title":"Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root","description":"A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.","severity":{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00592,"percentile":0.48553,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-59"],"published":"2026-08-12T20:00:09Z","modified":"2026-10-28T02:30:57Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"lxd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.2+git20231211.1364ae4-1","5.0.2+git20231211.1364ae4-2","5.0.2+git20231211.1364ae4-3","5.0.2+git20231211.1364ae4-4","5.0.2+git20231211.1364ae4-5","5.0.2+git20231211.1364ae4-6","5.0.2+git20231211.1364ae4-7","5.0.2+git20231211.1364ae4-8","5.0.2+git20231211.1364ae4-9","5.0.2-5","5.0.2-5+deb12u1","5.0.2-5+deb12u2","5.0.2-5+deb12u3","5.0.2-5+deb12u4","5.0.2-5+deb12u5","5.0.2-5+deb12u6","5.0.2-6"]},{"source":"osv","ecosystem":"Debian:13","package":"lxd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.2+git20231211.1364ae4-9","5.0.2+git20231211.1364ae4-9+deb13u1","5.0.2+git20231211.1364ae4-9+deb13u2","5.0.2+git20231211.1364ae4-9+deb13u3","5.0.2+git20231211.1364ae4-9+deb13u4","5.0.2+git20231211.1364ae4-9+deb13u5","5.0.2+git20231211.1364ae4-9+deb13u6","5.0.2+git20231211.1364ae4-9+deb13u7"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"lxd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.20-0ubuntu4","0.21-0ubuntu3","0.21-0ubuntu5","0.22-0ubuntu1","0.22-0ubuntu2","0.23-0ubuntu1","0.23-0ubuntu2","0.23-0ubuntu3","0.24-0ubuntu2","0.24-0ubuntu3","0.24-0ubuntu4","0.25-0ubuntu1","0.26-0ubuntu2","0.26-0ubuntu3","0.27-0ubuntu1","0.27-0ubuntu2","2.0.0~beta1-0ubuntu3","2.0.0~beta1-0ubuntu4","2.0.0~beta2-0ubuntu1","2.0.0~beta2-0ubuntu2","2.0.0~beta3-0ubuntu1","2.0.0~beta3-0ubuntu2","2.0.0~beta3-0ubuntu3","2.0.0~beta3-0ubuntu4","2.0.0~beta4-0ubuntu1","2.0.0~beta4-0ubuntu2","2.0.0~beta4-0ubuntu3","2.0.0~beta4-0ubuntu4","2.0.0~beta4-0ubuntu5","2.0.0~beta4-0ubuntu6","2.0.0~beta4-0ubuntu7","2.0.0~rc1-0ubuntu1","2.0.0~rc1-0ubuntu2","2.0.0~rc1-0ubuntu3","2.0.0~rc2-0ubuntu2","2.0.0~rc2-0ubuntu3","2.0.0~rc3-0ubuntu1","2.0.0~rc3-0ubuntu2","2.0.0~rc3-0ubuntu3","2.0.0~rc3-0ubuntu4","2.0.0~rc4-0ubuntu1","2.0.0~rc5-0ubuntu1","2.0.0~rc6-0ubuntu1","2.0.0~rc6-0ubuntu2","2.0.0~rc7-0ubuntu1","2.0.0~rc7-0ubuntu2","2.0.0~rc8-0ubuntu1","2.0.0~rc8-0ubuntu2","2.0.0~rc8-0ubuntu3","2.0.0~rc8-0ubuntu5","2.0.0~rc8-0ubuntu6","2.0.0~rc8-0ubuntu7","2.0.0~rc9-0ubuntu2","2.0.0~rc9-0ubuntu3","2.0.0~rc9-0ubuntu4","2.0.0~rc9-0ubuntu5","2.0.0-0ubuntu1","2.0.0-0ubuntu2","2.0.0-0ubuntu3","2.0.0-0ubuntu4","2.0.1-0ubuntu1~16.04.1","2.0.2-0ubuntu1~16.04.1","2.0.3-0ubuntu1~ubuntu16.04.2","2.0.4-0ubuntu1~ubuntu16.04.1","2.0.5-0ubuntu1~ubuntu16.04.1","2.0.8-0ubuntu1~ubuntu16.04.1","2.0.8-0ubuntu1~ubuntu16.04.2","2.0.9-0ubuntu1~16.04.1","2.0.9-0ubuntu1~16.04.2","2.0.10-0ubuntu1~16.04.1","2.0.10-0ubuntu1~16.04.2","2.0.11-0ubuntu1~16.04.2","2.0.11-0ubuntu1~16.04.4","2.0.11-0ubuntu1~16.04.4+esm1","2.0.11-0ubuntu1~16.04.4+esm2","2.0.11-0ubuntu1~16.04.4+esm3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"lxd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.18-0ubuntu6","2.19-0ubuntu1","2.20-0ubuntu3","2.20-0ubuntu4","2.21-0ubuntu1","2.21-0ubuntu2","2.21-0ubuntu3","2.21-0ubuntu4","3.0.0~beta2-0ubuntu3","3.0.0~beta3-0ubuntu3","3.0.0~beta5-0ubuntu2","3.0.0~beta7-0ubuntu1","3.0.0-0ubuntu1","3.0.0-0ubuntu2","3.0.0-0ubuntu3","3.0.0-0ubuntu4","3.0.1-0ubuntu1~18.04.1","3.0.2-0ubuntu1~18.04.1","3.0.3-0ubuntu1~18.04.1","3.0.3-0ubuntu1~18.04.2","3.0.3-0ubuntu1~18.04.2+esm1","3.0.3-0ubuntu1~18.04.2+esm2","3.0.3-0ubuntu1~18.04.2+esm3"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"lxd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.7","1:0.8","1:0.9","1:0.10"]},{"source":"osv","ecosystem":"openSUSE:Leap 16.0","package":"lxd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.21.6-bp160.1.1"}]}],"bundled":9}],"products":[{"vendor":"canonical","product":"lxd"}],"references":[{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-j825-cg34-5fr5","tags":["vdb-entry","vendor-advisory","exploit","Vendor Advisory","Exploit","advisory","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63293.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63293","tags":["advisory"]},{"url":"https://github.com/canonical/lxd","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-63293","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-63293","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63293","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1223794","tags":["report"]},{"url":"https://bugzilla.suse.com/1274936","tags":["report"]},{"url":"https://bugzilla.suse.com/1274937","tags":["report"]},{"url":"https://bugzilla.suse.com/1274954","tags":["report"]},{"url":"https://bugzilla.suse.com/1274961","tags":["report"]},{"url":"https://bugzilla.suse.com/1274963","tags":["report"]},{"url":"https://bugzilla.suse.com/1275084","tags":["report"]},{"url":"https://bugzilla.suse.com/1275085","tags":["report"]},{"url":"https://bugzilla.suse.com/1275090","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2023-46565","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-62420","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-63293","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-63295","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-63296","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-63297","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-63298","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-63299","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-66898","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-63293","title":"Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root","description":"A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.","status":"published","published":"2026-08-12T20:00:09.214Z","modified":"2026-08-13T12:40:35.947Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:19:55.914391Z"}],"euvd":[{"id":"EUVD-2026-57540","description":"A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.","status":"published","published":"2026-08-12T20:00:09Z","modified":"2026-08-13T12:40:35Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:01:57.213133Z"}],"nvd":[{"id":"CVE-2026-63293","description":"A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.","status":"published","published":"2026-08-12T20:17:47.06Z","modified":"2026-10-24T16:10:00.153Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:12:37.217486Z"}],"osv":[{"id":"CVE-2026-63293","title":"Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root","description":"A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.","status":"published","published":"2026-08-12T20:00:09.214Z","modified":"2026-10-28T02:30:57.212775901Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T15:45:13.306117Z"},{"id":"DEBIAN-CVE-2026-63293","description":"A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.","status":"published","published":"2026-08-12T20:17:47.06Z","modified":"2026-10-25T09:47:36.425874487Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:57.932517Z"},{"id":"UBUNTU-CVE-2026-63293","description":"A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.","status":"published","published":"2026-08-12T20:17:00Z","modified":"2026-08-19T11:06:33Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T16:56:43.630667Z"},{"id":"openSUSE-SU-2026:21788-1","title":"Security update for lxd","description":"This update for lxd fixes the following issues:\n\nChanges in lxd:\n\n- update to 5.21.6:\n  * bsc#1274937, CVE-2026-63293, bsc#1274936, CVE-2026-62420,\n    bsc#1274954, CVE-2026-63295, bsc#1274963, CVE-2026-63297,\n    bsc#1274961, CVE-2026-63296, bsc#1275085, CVE-2026-63299,\n    bsc#1275084, CVE-2026-63298, bsc#1275090, CVE-2026-66898\n  * https://canonical.com/lxd/docs/latest/reference/release-\n    notes/5.21/release-notes-5.21.6/\n  * https://canonical.com/lxd/docs/latest/reference/release-\n    notes/5.21/release-notes-5.21.5/\n  * https://discourse.ubuntu.com/t/lxd-5-21-4-lts-has-been-\n    released/66602\n  * https://discourse.ubuntu.com/t/lxd-5-21-3-lts-has-been-\n    released/53768\n  * https://discourse.ubuntu.com/t/lxd-5-21-2-has-been-\n    released/46443\n\n- Migrate to single LXD/Incus OVMF handling (lxd-ovmf-setup):\n  * Allow aarch64 arch_vm_support\n  * Remove OVMF symlinks\n  * Require the new lxd-ovmf-setup packages\n","status":"published","published":"2026-09-02T12:35:45Z","modified":"2026-09-09T18:23:15.579056028Z","updated_at":"2026-11-02T16:58:42.426393Z"}]}}