CVE-2026-34179— Update of type field in restricted TLS certificate allows privilege escalation to cluster admin
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I. Basic Information for CVE-2026-34179
Vulnerability Information
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Vulnerability Title
Update of type field in restricted TLS certificate allows privilege escalation to cluster admin
Source: NVD (National Vulnerability Database)
Vulnerability Description
In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.
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
CWE-915
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 4.12至6.7版本存在安全漏洞，该漏洞源于处理受限TLS证书用户的PUT/PATCH请求时，doCertificateUpdate函数未验证Type字段，可能导致远程经过身份验证的攻击者将权限提升至集群管理员。
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)
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Affected Products
II. Public POCs for CVE-2026-34179
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 14100 chars
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III. Intelligence Information for CVE-2026-34179
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Same Patch Batch · Canonical · 2026-04-09 · 5 CVEs total
| CVE-2026-34178 | 9.1 CRITICAL | Importing a crafted backup leads to project restriction bypass |
| 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-2026-34178
Importing a crafted backup leads to project restriction bypa - 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-915
- CVE-2025-14341
Input Data Manipulation in DivvyDrive Information Technologi - CVE-2026-41139
Unsafe array index getter in mathjs - CVE-2026-33453
Apache Camel: CoAP URI Query Parameter to Exchange Header In - CVE-2026-42044
Axios: Invisible JSON Response Tampering via Prototype Pollu - CVE-2026-40897
Math.js: Unsafe object property setter in mathjs
V. Comments for CVE-2026-34179
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