{"id":"CVE-2026-63125","state":"PUBLISHED","title":"Incus vulnerable to root RCE via image backup.yaml symlink","description":"Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with `can_create_images` and `can_create_instances`) can execute arbitrary code as root on the host. A crafted image ships `backup.yaml` as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.","publishedAt":"2026-08-21T14:49:16.844Z","updatedAt":"2026-08-21T15:02:55.718Z","severity":{"score":9.9,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["lxc incus"],"affected":[{"vendor":"lxc","product":"incus","versions":[{"version":"< 7.3.0","status":"affected"}]}],"references":["https://github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36"],"weaknesses":["CWE-59","CWE-61"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63125.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63125","state":"PUBLISHED","datePublished":"2026-08-21T14:49:16.844Z","dateUpdated":"2026-08-21T15:02:55.718Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-15T16:54:55.816Z"},"containers":{"cna":{"title":"Incus vulnerable to root RCE via image backup.yaml symlink","descriptions":[{"lang":"en","value":"Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with `can_create_images` and `can_create_instances`) can execute arbitrary code as root on the host. A crafted image ships `backup.yaml` as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue."}],"affected":[{"vendor":"lxc","product":"incus","versions":[{"version":"< 7.3.0","status":"affected"}]}],"references":[{"url":"https://github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36","name":"https://github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.9,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-59","lang":"en","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-61","lang":"en","description":"CWE-61: UNIX Symbolic Link (Symlink) Following","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-21T14:49:16.844Z"},"source":{"advisory":"GHSA-6rqx-22hc-qm36","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-21T15:02:31.652417Z","id":"CVE-2026-63125","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-21T15:02:55.718Z"}}]}}}