{"id":"CVE-2026-62420","title":"An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project security restrictions during cross-project instance migrations","summary":"An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project security restrictions during cross-project instance migrations. When moving an instance cross-project to a different cluster member vi…","severity":"critical","cvss":9.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-863"],"vendor":"canonical","product":"lxd","affected":["lxd >= 5.0.0, < 5.0.8","lxd >= 5.1, < 5.21.6","lxd >= 6.0, < 6.10"],"patched":["lxd 6.10"],"published":"2026-08-12","updated":"2026-09-11","sourceUpdated":"2026-09-11T14:32:59.620","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-62420","references":[{"url":"https://github.com/canonical/lxd/pull/18605","label":"security@ubuntu.com"},{"url":"https://github.com/canonical/lxd/pull/18651","label":"security@ubuntu.com"},{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-v9wr-9r7q-fh4g","label":"security@ubuntu.com"},{"url":"https://github.com/canonical/lxd/security/advisories/GHSA-v9wr-9r7q-fh4g","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00369,"epssPercentile":0.30831,"ingestedAt":"2026-09-11T17:50:33.510Z","slug":"CVE-2026-62420","body":"## Overview\n\nAn authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project security restrictions during cross-project instance migrations. When moving an instance cross-project to a different cluster member via POST /1.0/instances/{name} with migration: true, project: <target>, and target: <member>, the destination node skips all project restriction checks because the request arrives as an internal cluster notification. An attacker can exploit this to introduce disallowed instance configurations into a restricted project.\n\n## Affected\n\n- `lxd >= 5.0.0, < 5.0.8`\n- `lxd >= 5.1, < 5.21.6`\n- `lxd >= 6.0, < 6.10`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `lxd 6.10`","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":54.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}