CVE-2026-34178

CRITICAL EPSS 34.0%
Published Apr 9, 20262mo ago · Modified Jun 17, 20262w ago
9.1 CVSS 3.1
Critical
Find Similar
Published Apr 9, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
9.1
Exploitability
2.3
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
34.0% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-20 Improper Input Validation Validation

Affected Products 3

VendorProductVersionRange
canonicallxd*≥4.12  –  ≤5.0.6
canonicallxd*≥5.21.0  –  ≤5.21.4
canonicallxd*≥6.0  –  ≤6.7

References 2

  • github.com https://github.com/canonical/lxd/pull/17921
    Issue Tracking
  • github.com https://github.com/canonical/lxd/security/advisories/GHSA-q96j-3fmm-7fv4
    ExploitThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.