CVE-2026-87799 Canonical LXD - Path Traversal

Canonical LXD >= 4.0 contains a path traversal caused by improper link resolution in migration receive path, letting authenticated clients or malicious migration sources write files as root, exploit requires instance or volume creation privileges.

CVSS base score 9.9 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.41% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
File System Write, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
28 September 2026
Updated
15 October 2026
Weakness
CWE-59

Vendor fix

Upgrade to versions 4.0.14, 5.0.10, 5.21.8, 6.10 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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