Vulnerabilidades do Canonical Lxd

CVE-2026-28385 Média · 5.0 CWE-918 26/06/2026

SSRF via image import from URL allows internal network probing by authenticated users

In Canonical LXD versions 4.12 through 6.9, a Server-Side Request Forgery (SSRF) vulnerability in the image import functionality allows authenticated users with the can_create_images entitlement to interact with internal network infrastructure via the /images endpoint. When importing an image from a URL source, the LXD daemon fails to validate or restrict outbound destination IP addresses, allowing connections to loopback, RFC1918 private ranges, and cloud metadata endpoints. This enables error-based port scanning and unauthorized interaction with internal HTTP services from the daemon's network position.

CVE-2026-9640 Alta · 7.2 CWE-863 26/06/2026

LXD Snapshot Import Privilege Escalation Vulnerability

A privilege escalation vulnerability exists in LXD from 6.0 before 6.9, 5.21.0 before 5.21.5, and 5.0.0 before 5.0.7 regarding the handling of project-restriction policies during snapshot restoration.. An authenticated project operator in a restricted multi-tenant environment can bypass policy restrictions by importing a maliciously crafted instance backup containing restricted configuration keys within a snapshot. When the snapshot is restored, these restricted keys are applied to the live instance without policy validation. Starting the modified instance grants the operator unauthorized host root access.

CVE-2026-9639 Média · 6.5 CWE-476 26/06/2026

Authenticated Denial of Service via Malicious Backup Tarball in LXD

Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that omits the expires_at snapshot field.

CVE-2026-12411 Crítica · 9.6 CWE-639 26/06/2026

Canonical LXD: Quebra de Controle de Acesso (IDOR) no Handler PATCH do devLXD

Controle de acesso quebrado no componente devLXDInstancePatchHandler do Canonical LXD permite que um convidado não confiável monte, leia e sobrescreva o volume de armazenamento personalizado de outro convidado por meio de uma requisição PATCH de dispositivo elaborada sobre /dev/lxd quando security.devlxd.management.volumes está habilitado.

CVE-2026-34179 Crítica · 9.1 CWE-915 09/04/2026

Update of type field in restricted TLS certificate allows privilege escalation to cluster admin

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.

CVE-2026-34178 Crítica · 9.1 CWE-20 09/04/2026

Importing a crafted backup leads to project restriction bypass

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.

CVE-2026-34177 Crítica · 9.1 CWE-184 09/04/2026

VM lowlevel restriction bypass via raw.apparmor and raw.qemu.conf

Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden (lxd/project/limits/permissions.go), which omits raw.apparmor and raw.qemu.conf from the set of keys blocked under the restricted.virtual-machines.lowlevel=block project restriction. A remote attacker with can_edit permission on a VM instance in a restricted project can inject an AppArmor rule and a QEMU chardev configuration that bridges the LXD Unix socket into the guest VM, enabling privilege escalation to LXD cluster administrator and subsequently to host root.

CVE-2026-28384 Crítica · 9.9 CWE-78 12/03/2026

Authenticated RCE via unsanitized compression_algorithm

An improper sanitization of the compression_algorithm parameter in Canonical LXD allows an authenticated, unprivileged user to execute commands as the LXD daemon on the LXD server via API calls to the image and backup endpoints. This issue affected LXD from 4.12 through 6.6 and was fixed in the snap versions 5.0.6-e49d9f4 (channel 5.0/stable), 5.21.4-1374f39 (channel 5.21/stable), and 6.7-1f11451 (channel 6.0 stable). The channel 4.0/stable is not affected as it contains version 4.0.10.

CVE-2026-3351 Média · 4.3 CWE-862 03/03/2026

Authorization Bypass in LXD GET /1.0/certificates Endpoint

Improper authorization in the API endpoint GET /1.0/certificates in Canonical LXD 6.6 on Linux allows an authenticated, restricted user to enumerate all certificate fingerprints trusted by the lxd server.

CVE-2025-54293 Média · 6.5 CWE-22 02/10/2025

Path Traversal in LXD Instance Log File Retrieval

Path Traversal in the log file retrieval function in Canonical LXD 5.0 LTS on Linux allows authenticated remote attackers to read arbitrary files on the host system via crafted log file names or symbolic links.

CVE-2025-54292 Média · 4.6 CWE-22 02/10/2025

Client-Side Path Traversal in LXD-UI

Path traversal in Canonical LXD LXD-UI versions before 6.5 and 5.21.4 on all platforms allows remote authenticated attackers to access or modify unintended resources via crafted resource names embedded in URL paths.

CVE-2025-54291 Média · 5.3 CWE-209 02/10/2025

Project existence disclosure in LXD images API

Information disclosure in images API in Canonical LXD before 6.5 and 5.21.4 on all platforms allows unauthenticated remote attackers to determine project existence via differing HTTP status code responses.

CVE-2025-54290 Média · 5.3 CWE-200 02/10/2025

Project Existence Disclosure via Error Handling in LXD Image Export

Information disclosure in image export API in Canonical LXD before 6.5 and 5.21.4 on Linux allows network attackers to determine project existence without authentication via crafted requests using wildcard fingerprints.

CVE-2025-54289 Alta · 8.1 CWE-1385 02/10/2025

Privilege Escalation via WebSocket Connection Hijacking in LXD Operations API

Privilege Escalation in operations API in Canonical LXD <6.5 on multiple platforms allows attacker with read permissions to hijack terminal or console sessions and execute arbitrary commands via WebSocket connection hijacking format

CVE-2025-54288 Média · 6.8 CWE-290 02/10/2025

Source Container Identification Vulnerability via cmdline Spoofing in devLXD Server

Information Spoofing in devLXD Server in Canonical LXD versions 4.0 and above on Linux container platforms allows attackers with root privileges within any container to impersonate other containers and obtain their metadata, configuration, and device information via spoofed process names in the command line.

CVE-2025-54287 Média · 6.5 CWE-1336 02/10/2025

Arbitrary File Read via Template Injection in Snapshot Patterns

Template Injection in instance snapshot creation component in Canonical LXD (>= 4.0) allows an attacker with instance configuration permissions to read arbitrary files on the host system via specially crafted snapshot pattern templates using the Pongo2 template engine.

CVE-2025-54286 Alta · 8.8 CWE-352 02/10/2025

CSRF Vulnerability When Using Client Certificate Authentication with the LXD-UI

Cross-Site Request Forgery (CSRF) in LXD-UI in Canonical LXD versions >= 5.0 on Linux allows an attacker to create and start container instances without user consent via crafted HTML form submissions exploiting client certificate authentication.