CVE-2026-34178— Importing a crafted backup leads to project restriction bypass
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-34178
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Importing a crafted backup leads to project restriction bypass
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
LXD 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LXD是Canonical开源的一款基于Linux系统用于管理应用程序的容器。 LXD 6.8之前版本存在安全漏洞，该漏洞源于备份导入路径仅验证备份存档中的backup/index.yaml文件，而未对backup/container/backup.yaml文件进行项目限制检查，可能导致经过身份验证的远程攻击者绕过所有项目限制，完全控制主机。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Shenlong Deep Dive — AI Deep Analysis
10-question deep dive: root cause, exploitation, mitigation, urgency. Read summary free, full version requires login.
Affected Products
II. Public POCs for CVE-2026-34178
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6096 chars
Paid plan includes:
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month
III. Intelligence Information for CVE-2026-34178
Please Login to view more intelligence information
Same Patch Batch · Canonical · 2026-04-09 · 5 CVEs total
| CVE-2026-34179 | 9.1 CRITICAL | Update of type field in restricted TLS certificate allows privilege escalation to cluster |
| CVE-2026-34177 | 9.1 CRITICAL | VM lowlevel restriction bypass via raw.apparmor and raw.qemu.conf |
| CVE-2025-15480 | Senstive information disclosure was affecting ubuntu-desktop-provision | |
| CVE-2025-14551 | Senstive information disclosure was affecting subiquity |
IV. Related Vulnerabilities
Same product: lxd
- CVE-2026-34179
Update of type field in restricted TLS certificate allows pr - CVE-2026-34177
VM lowlevel restriction bypass via raw.apparmor and raw.qemu - CVE-2026-28384
Authenticated RCE via unsanitized compression_algorithm - CVE-2026-3351
Authorization Bypass in LXD GET /1.0/certificates Endpoint - CVE-2025-54293
Path Traversal in LXD Instance Log File Retrieval
Same vendor: Canonical
- CVE-2026-6970
authd Denial of Service and Local Privilege Escalation - CVE-2026-6369
Exposed Session Token in canonical-livepatch client snap - CVE-2026-5412
Juju CloudSpec API could leak senstive information - CVE-2026-5774
Juju API Server Denial of Service and Authentication Replay - CVE-2025-14551
Senstive information disclosure was affecting subiquity
Same weakness: CWE-20
V. Comments for CVE-2026-34178
No comments yet