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CVE-2026-34178

Importing a crafted backup leads to project restriction bypass PUBLISHED

Description (CNA)

In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the supplied tar archive but creates the instance from backup/container/backup.yaml, a separate file in the same archive that is never checked against project restrictions. An authenticated remote attacker with instance-creation permission in a restricted project can craft a backup archive where backup.yaml carries restricted settings such as security.privileged=true or raw.lxc directives, bypassing all project restriction enforcement and allowing full host compromise.

Affected (CNA)

Vendor / productVersions
Canonical / lxdaffected 4.12.0 before 5.0.7; affected 5.1.0 before 5.21.5; affected 6.0.0 before 6.8.0

CWE

CWE-20

References

ADP enrichment

CISA-ADP

No English description supplied.