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8918 vulnerabilities by Canonical
CVE-2026-66897 (GCVE-0-2026-66897)
Vulnerability from nvd – Published: 2026-08-24 09:08 – Updated: 2026-08-25 03:55
VLAI
EPSS
VEX
Title
Instance template path traversal allows arbitrary host file write as root
Summary
A path traversal vulnerability in LXD's instance template processing allows an attacker with container edit permissions, or any user launching a crafted image, to overwrite arbitrary files on the host system as root. When processing target template paths specified in metadata.yaml, LXD validates the path against a confined os.Root directory handle but subsequently opens and creates the file using os.Create with an unconfined string path. This discrepancy between path resolution checks and file creation allows an attacker to escape directory confinement, overwrite root-owned host files, and achieve host root code execution.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 00:00 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-77113 (GCVE-0-2026-77113)
Vulnerability from nvd – Published: 2026-08-20 22:32 – Updated: 2026-08-21 20:08
VLAI
EPSS
VEX
Title
Path Traversal Vulnerability in apport-unpack
Summary
Path traversal in apport-unpack in Canonical Apport before 2.36.0, 2.34.2, and 2.28.4 on Linux allows an attacker to create or overwrite arbitrary files with the privileges of the executing user via an attacker controlled key names in crash report files.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:50 UTC
CWE
- CWE-23 - Relative path traversal
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://launchpad.net/bugs/2161697 | issue-trackingvendor-advisory |
| https://github.com/canonical/apport/pull/646 | patch |
Impacted products
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CVE-2026-61898 (GCVE-0-2026-61898)
Vulnerability from nvd – Published: 2026-08-20 14:32 – Updated: 2026-08-26 19:50
VLAI
EPSS
VEX
Title
accountsservice: shell injection via attacker-controlled ~/.pam_environment in Ubuntu language helper scripts
Summary
The Ubuntu-specific language helper scripts (save-to-pam-env, update-langlist) shipped with accountsservice before 23.13.9-8ubuntu7 treat the user-controlled LANGUAGE entry in ~/.pam_environment as trusted input. The value is interpolated unescaped into a GNU sed replacement expression, allowing an attacker to inject a sed 'e' flag and arbitrary shell commands that execute with the privileges of the AccountsService helper process (real UID 0) via the SetLanguage D-Bus method.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 19:43 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/account… | issue-tracking |
| https://ubuntu.com/security/CVE-2026-61898 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | accountsservice |
Affected:
22.07.5-2ubuntu1 , < 22.07.5-2ubuntu1.6
(dpkg)
Affected: 23.13.9-2ubuntu6 , < 23.13.9-2ubuntu6.1 (dpkg) Affected: 23.13.9-8ubuntu5 , < 23.13.9-8ubuntu5.2 (dpkg) Affected: 23.13.9-8ubuntu6 , < 23.13.9-8ubuntu7 (dpkg) |
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CVE-2026-61897 (GCVE-0-2026-61897)
Vulnerability from nvd – Published: 2026-08-20 14:32 – Updated: 2026-08-26 19:50
VLAI
EPSS
VEX
Title
accountsservice: incomplete privilege drop when running Ubuntu-specific language helper scripts
Summary
An Ubuntu-specific patch to AccountsService before 23.13.9-8ubuntu7 only partially drops privileges before launching language helper scripts. It changes the effective UID/GID to the target user but leaves the real UID as 0 (root). A shell spawned by a helper script inherits ruid=0 and may reset its effective UID to root, enabling local privilege escalation.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 19:43 UTC
CWE
- CWE-273 - Improper Check for Dropped Privileges
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/account… | issue-tracking |
| https://ubuntu.com/security/CVE-2026-61897 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | accountsservice |
Affected:
22.07.5-2ubuntu1 , < 22.07.5-2ubuntu1.6
(dpkg)
Affected: 23.13.9-2ubuntu6 , < 23.13.9-2ubuntu6.1 (dpkg) Affected: 23.13.9-8ubuntu5 , < 23.13.9-8ubuntu5.2 (dpkg) Affected: 23.13.9-8ubuntu6 , < 23.13.9-8ubuntu7 (dpkg) |
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CVE-2026-66898 (GCVE-0-2026-66898)
Vulnerability from nvd – Published: 2026-08-12 20:07 – Updated: 2026-08-13 13:40
VLAI
EPSS
VEX
Title
Path traversal via unvalidated instance name in backup tarball restore enables root file write / RCE
Summary
A path traversal vulnerability in LXD allows an attacker to manipulate file system paths during backup import and restore operations. When importing or restoring a backup archive, LXD fails to validate instance and storage volume names contained within the archive metadata. An attacker can exploit this flaw by supplying a crafted backup archive with malicious instance or volume names containing path traversal sequences, potentially allowing file access or overwriting outside the designated restore directory.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 13:40 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-16033 (GCVE-0-2026-16033)
Vulnerability from nvd – Published: 2026-08-12 20:11 – Updated: 2026-08-13 12:46
VLAI
EPSS
VEX
Title
Arbitrary file read+write on host via templates/ symlink in malicious image
Summary
A path traversal vulnerability in LXD allows an attacker to achieve arbitrary host file read or unconstrained file creation. When processing image metadata templates, LXD fails to properly sanitize or restrict template file paths from escaping the instance templates directory (specifically affecting virtual machine / QEMU driver execution paths). An attacker can exploit this flaw by providing a crafted image archive with malicious template directives containing path traversal sequences, causing LXD to access or write files outside the intended template directory on the host system.
Severity
8.5 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 12:45 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-63300 (GCVE-0-2026-63300)
Vulnerability from nvd – Published: 2026-08-12 19:09 – Updated: 2026-08-13 13:19
VLAI
EPSS
VEX
Title
Cross-project instance move bypasses all project restrictions allowing host command execution
Summary
An improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an authenticated attacker with can_create_instances permissions on a restricted project to bypass project-level security restrictions. When migrating an instance between projects, LXD fails to validate the instance's configuration against the target project's enforced restrictions (such as restricted.containers.lowlevel, restricted.devices.*, and restricted.networks.access). An attacker can exploit this by creating a disallowed or high-privilege instance in an unrestricted project and subsequently moving it into the restricted project.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 03:55 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
| https://github.com/canonical/lxd/pull/18651 | patch |
| https://github.com/canonical/lxd/pull/18605 | patch |
Impacted products
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CVE-2026-63299 (GCVE-0-2026-63299)
Vulnerability from nvd – Published: 2026-08-12 19:17 – Updated: 2026-08-12 19:26
VLAI
EPSS
VEX
Title
Storage volume cross-project move and snapshot restore bypass project disk limits
Summary
An authorization bypass vulnerability in LXD allows an authenticated user to bypass project-level disk and volume limits. Two related code paths fail to verify resource limits during volume operations: the storagePoolVolumeTypePostMove function omits the limits.AllowVolumeCreation check before moving a volume across projects, and volume snapshot restore operations skip the AllowVolumeUpdate check when the configuration is nil (Config == nil). An attacker can exploit these flaws to allocate storage resources that exceed the administrative limits configured for a project.
Severity
8.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 19:26 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-63298 (GCVE-0-2026-63298)
Vulnerability from nvd – Published: 2026-08-12 19:22 – Updated: 2026-08-13 14:33
VLAI
EPSS
VEX
Title
LXD arbitrary lxc.conf directive injection via NVIDIA instance configuration
Summary
An improper neutralization of special elements vulnerability in LXD's NVIDIA instance configuration handling allows an authenticated attacker to inject arbitrary configuration directives. By supplying newline characters within the 'nvidia.driver.capabilities' or 'nvidia.require.*' configuration values, an attacker can manipulate the generated lxc.conf file. This flaw enables the attacker to execute arbitrary code on the host system with the privileges of the LXD daemon.
Severity
8.7 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:33 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-63297 (GCVE-0-2026-63297)
Vulnerability from nvd – Published: 2026-08-12 19:25 – Updated: 2026-08-13 14:29
VLAI
EPSS
VEX
Title
Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge
Summary
An authorization bypass vulnerability in LXD due to a timing flaw during configuration merging allows an authenticated attacker to bypass target project restrictions during cross-project instance copies. When copying an instance to a target project, LXD performs restriction checks before configuration merging is complete, creating a time-of-check to time-of-use (TOCTOU) condition. An attacker can exploit this flaw to copy instances with disallowed high-privilege configurations into restricted projects, bypassing security controls.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:28 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
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CVE-2026-63296 (GCVE-0-2026-63296)
Vulnerability from nvd – Published: 2026-08-12 19:27 – Updated: 2026-08-13 14:25
VLAI
EPSS
VEX
Title
Project restriction bypass via instance migration config override
Summary
An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project restrictions during instance migration. When migrating an instance to a target project, LXD accepts configuration overrides without validating the new configuration against the target project's enforced restrictions. An attacker can exploit this flaw to move instances with disallowed high-privilege configurations into restricted projects, bypassing security controls.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:25 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
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CVE-2026-63295 (GCVE-0-2026-63295)
Vulnerability from nvd – Published: 2026-08-12 19:31 – Updated: 2026-08-13 14:24
VLAI
EPSS
VEX
Title
Project restriction `restricted.containers.privilege=isolated` bypassable by omitting `security.idmap.isolated`
Summary
An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass project-level container isolation restrictions. When a project is configured with restrictions on container privileges (such as enforcing restricted.containers.privilege=isolated), LXD fails to enforce the requirement if an instance configuration omits the security.idmap.isolated key. An attacker can exploit this flaw by creating or updating an instance without explicitly setting security.idmap.isolated, bypassing the target project's security constraints.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:23 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-63294 (GCVE-0-2026-63294)
Vulnerability from nvd – Published: 2026-08-12 19:57 – Updated: 2026-08-13 12:38
VLAI
EPSS
VEX
Title
Root RCE via image backup.yaml symlink
Summary
A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly validate and confine the backup.yaml file when it exists as a symbolic link. An attacker can exploit this flaw by providing a malicious archive with a symlinked backup.yaml file, causing LXD to process unconfined configuration metadata and execute arbitrary commands with root privileges.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 12:38 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-63293 (GCVE-0-2026-63293)
Vulnerability from nvd – Published: 2026-08-12 20:00 – Updated: 2026-08-13 12:40
VLAI
EPSS
VEX
Title
Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root
Summary
A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 12:39 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-62420 (GCVE-0-2026-62420)
Vulnerability from nvd – Published: 2026-08-12 19:12 – Updated: 2026-08-12 19:27
VLAI
EPSS
VEX
Title
Cross-project cluster migration bypasses project restrictions via cluster notification flag
Summary
An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project security restrictions during cross-project instance migrations. When moving an instance cross-project to a different cluster member via POST /1.0/instances/{name} with migration: true, project: <target>, and target: <member>, the destination node skips all project restriction checks because the request arrives as an internal cluster notification. An attacker can exploit this to introduce disallowed instance configurations into a restricted project.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 19:26 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
| https://github.com/canonical/lxd/pull/18651 | patch |
| https://github.com/canonical/lxd/pull/18605 | patch |
Impacted products
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CVE-2026-66897 (GCVE-0-2026-66897)
Vulnerability from cvelistv5 – Published: 2026-08-24 09:08 – Updated: 2026-08-25 03:55
VLAI
EPSS
VEX
Title
Instance template path traversal allows arbitrary host file write as root
Summary
A path traversal vulnerability in LXD's instance template processing allows an attacker with container edit permissions, or any user launching a crafted image, to overwrite arbitrary files on the host system as root. When processing target template paths specified in metadata.yaml, LXD validates the path against a confined os.Root directory handle but subsequently opens and creates the file using os.Create with an unconfined string path. This discrepancy between path resolution checks and file creation allows an attacker to escape directory confinement, overwrite root-owned host files, and achieve host root code execution.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 00:00 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-77113 (GCVE-0-2026-77113)
Vulnerability from cvelistv5 – Published: 2026-08-20 22:32 – Updated: 2026-08-21 20:08
VLAI
EPSS
VEX
Title
Path Traversal Vulnerability in apport-unpack
Summary
Path traversal in apport-unpack in Canonical Apport before 2.36.0, 2.34.2, and 2.28.4 on Linux allows an attacker to create or overwrite arbitrary files with the privileges of the executing user via an attacker controlled key names in crash report files.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:50 UTC
CWE
- CWE-23 - Relative path traversal
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://launchpad.net/bugs/2161697 | issue-trackingvendor-advisory |
| https://github.com/canonical/apport/pull/646 | patch |
Impacted products
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CVE-2026-61898 (GCVE-0-2026-61898)
Vulnerability from cvelistv5 – Published: 2026-08-20 14:32 – Updated: 2026-08-26 19:50
VLAI
EPSS
VEX
Title
accountsservice: shell injection via attacker-controlled ~/.pam_environment in Ubuntu language helper scripts
Summary
The Ubuntu-specific language helper scripts (save-to-pam-env, update-langlist) shipped with accountsservice before 23.13.9-8ubuntu7 treat the user-controlled LANGUAGE entry in ~/.pam_environment as trusted input. The value is interpolated unescaped into a GNU sed replacement expression, allowing an attacker to inject a sed 'e' flag and arbitrary shell commands that execute with the privileges of the AccountsService helper process (real UID 0) via the SetLanguage D-Bus method.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 19:43 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/account… | issue-tracking |
| https://ubuntu.com/security/CVE-2026-61898 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | accountsservice |
Affected:
22.07.5-2ubuntu1 , < 22.07.5-2ubuntu1.6
(dpkg)
Affected: 23.13.9-2ubuntu6 , < 23.13.9-2ubuntu6.1 (dpkg) Affected: 23.13.9-8ubuntu5 , < 23.13.9-8ubuntu5.2 (dpkg) Affected: 23.13.9-8ubuntu6 , < 23.13.9-8ubuntu7 (dpkg) |
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CVE-2026-61897 (GCVE-0-2026-61897)
Vulnerability from cvelistv5 – Published: 2026-08-20 14:32 – Updated: 2026-08-26 19:50
VLAI
EPSS
VEX
Title
accountsservice: incomplete privilege drop when running Ubuntu-specific language helper scripts
Summary
An Ubuntu-specific patch to AccountsService before 23.13.9-8ubuntu7 only partially drops privileges before launching language helper scripts. It changes the effective UID/GID to the target user but leaves the real UID as 0 (root). A shell spawned by a helper script inherits ruid=0 and may reset its effective UID to root, enabling local privilege escalation.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 19:43 UTC
CWE
- CWE-273 - Improper Check for Dropped Privileges
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/account… | issue-tracking |
| https://ubuntu.com/security/CVE-2026-61897 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | accountsservice |
Affected:
22.07.5-2ubuntu1 , < 22.07.5-2ubuntu1.6
(dpkg)
Affected: 23.13.9-2ubuntu6 , < 23.13.9-2ubuntu6.1 (dpkg) Affected: 23.13.9-8ubuntu5 , < 23.13.9-8ubuntu5.2 (dpkg) Affected: 23.13.9-8ubuntu6 , < 23.13.9-8ubuntu7 (dpkg) |
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CVE-2026-16033 (GCVE-0-2026-16033)
Vulnerability from cvelistv5 – Published: 2026-08-12 20:11 – Updated: 2026-08-13 12:46
VLAI
EPSS
VEX
Title
Arbitrary file read+write on host via templates/ symlink in malicious image
Summary
A path traversal vulnerability in LXD allows an attacker to achieve arbitrary host file read or unconstrained file creation. When processing image metadata templates, LXD fails to properly sanitize or restrict template file paths from escaping the instance templates directory (specifically affecting virtual machine / QEMU driver execution paths). An attacker can exploit this flaw by providing a crafted image archive with malicious template directives containing path traversal sequences, causing LXD to access or write files outside the intended template directory on the host system.
Severity
8.5 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 12:45 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-66898 (GCVE-0-2026-66898)
Vulnerability from cvelistv5 – Published: 2026-08-12 20:07 – Updated: 2026-08-13 13:40
VLAI
EPSS
VEX
Title
Path traversal via unvalidated instance name in backup tarball restore enables root file write / RCE
Summary
A path traversal vulnerability in LXD allows an attacker to manipulate file system paths during backup import and restore operations. When importing or restoring a backup archive, LXD fails to validate instance and storage volume names contained within the archive metadata. An attacker can exploit this flaw by supplying a crafted backup archive with malicious instance or volume names containing path traversal sequences, potentially allowing file access or overwriting outside the designated restore directory.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 13:40 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-63293 (GCVE-0-2026-63293)
Vulnerability from cvelistv5 – Published: 2026-08-12 20:00 – Updated: 2026-08-13 12:40
VLAI
EPSS
VEX
Title
Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root
Summary
A link following vulnerability in LXD allows an attacker to achieve arbitrary file read and write operations on the host system. When importing or unpacking an image archive, LXD fails to validate whether the metadata.yaml file is a symbolic link. An attacker can exploit this flaw by providing a crafted image archive with a symlinked metadata.yaml file pointing to target file paths on the host system.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 12:39 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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}
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CVE-2026-63294 (GCVE-0-2026-63294)
Vulnerability from cvelistv5 – Published: 2026-08-12 19:57 – Updated: 2026-08-13 12:38
VLAI
EPSS
VEX
Title
Root RCE via image backup.yaml symlink
Summary
A link following vulnerability in LXD allows an attacker to achieve root command execution on the host system. During the import or unpacking of crafted image or backup archives, LXD fails to properly validate and confine the backup.yaml file when it exists as a symbolic link. An attacker can exploit this flaw by providing a malicious archive with a symlinked backup.yaml file, causing LXD to process unconfined configuration metadata and execute arbitrary commands with root privileges.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 12:38 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-63295 (GCVE-0-2026-63295)
Vulnerability from cvelistv5 – Published: 2026-08-12 19:31 – Updated: 2026-08-13 14:24
VLAI
EPSS
VEX
Title
Project restriction `restricted.containers.privilege=isolated` bypassable by omitting `security.idmap.isolated`
Summary
An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass project-level container isolation restrictions. When a project is configured with restrictions on container privileges (such as enforcing restricted.containers.privilege=isolated), LXD fails to enforce the requirement if an instance configuration omits the security.idmap.isolated key. An attacker can exploit this flaw by creating or updating an instance without explicitly setting security.idmap.isolated, bypassing the target project's security constraints.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:23 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-63296 (GCVE-0-2026-63296)
Vulnerability from cvelistv5 – Published: 2026-08-12 19:27 – Updated: 2026-08-13 14:25
VLAI
EPSS
VEX
Title
Project restriction bypass via instance migration config override
Summary
An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project restrictions during instance migration. When migrating an instance to a target project, LXD accepts configuration overrides without validating the new configuration against the target project's enforced restrictions. An attacker can exploit this flaw to move instances with disallowed high-privilege configurations into restricted projects, bypassing security controls.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:25 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
Impacted products
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CVE-2026-63297 (GCVE-0-2026-63297)
Vulnerability from cvelistv5 – Published: 2026-08-12 19:25 – Updated: 2026-08-13 14:29
VLAI
EPSS
VEX
Title
Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge
Summary
An authorization bypass vulnerability in LXD due to a timing flaw during configuration merging allows an authenticated attacker to bypass target project restrictions during cross-project instance copies. When copying an instance to a target project, LXD performs restriction checks before configuration merging is complete, creating a time-of-check to time-of-use (TOCTOU) condition. An attacker can exploit this flaw to copy instances with disallowed high-privilege configurations into restricted projects, bypassing security controls.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:28 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
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CVE-2026-63298 (GCVE-0-2026-63298)
Vulnerability from cvelistv5 – Published: 2026-08-12 19:22 – Updated: 2026-08-13 14:33
VLAI
EPSS
VEX
Title
LXD arbitrary lxc.conf directive injection via NVIDIA instance configuration
Summary
An improper neutralization of special elements vulnerability in LXD's NVIDIA instance configuration handling allows an authenticated attacker to inject arbitrary configuration directives. By supplying newline characters within the 'nvidia.driver.capabilities' or 'nvidia.require.*' configuration values, an attacker can manipulate the generated lxc.conf file. This flaw enables the attacker to execute arbitrary code on the host system with the privileges of the LXD daemon.
Severity
8.7 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 14:33 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
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CVE-2026-63299 (GCVE-0-2026-63299)
Vulnerability from cvelistv5 – Published: 2026-08-12 19:17 – Updated: 2026-08-12 19:26
VLAI
EPSS
VEX
Title
Storage volume cross-project move and snapshot restore bypass project disk limits
Summary
An authorization bypass vulnerability in LXD allows an authenticated user to bypass project-level disk and volume limits. Two related code paths fail to verify resource limits during volume operations: the storagePoolVolumeTypePostMove function omits the limits.AllowVolumeCreation check before moving a volume across projects, and volume snapshot restore operations skip the AllowVolumeUpdate check when the configuration is nil (Config == nil). An attacker can exploit these flaws to allocate storage resources that exceed the administrative limits configured for a project.
Severity
8.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 19:26 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
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CVE-2026-62420 (GCVE-0-2026-62420)
Vulnerability from cvelistv5 – Published: 2026-08-12 19:12 – Updated: 2026-08-12 19:27
VLAI
EPSS
VEX
Title
Cross-project cluster migration bypasses project restrictions via cluster notification flag
Summary
An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project security restrictions during cross-project instance migrations. When moving an instance cross-project to a different cluster member via POST /1.0/instances/{name} with migration: true, project: <target>, and target: <member>, the destination node skips all project restriction checks because the request arrives as an internal cluster notification. An attacker can exploit this to introduce disallowed instance configurations into a restricted project.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 19:26 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
| https://github.com/canonical/lxd/pull/18651 | patch |
| https://github.com/canonical/lxd/pull/18605 | patch |
Impacted products
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CVE-2026-63300 (GCVE-0-2026-63300)
Vulnerability from cvelistv5 – Published: 2026-08-12 19:09 – Updated: 2026-08-13 13:19
VLAI
EPSS
VEX
Title
Cross-project instance move bypasses all project restrictions allowing host command execution
Summary
An improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an authenticated attacker with can_create_instances permissions on a restricted project to bypass project-level security restrictions. When migrating an instance between projects, LXD fails to validate the instance's configuration against the target project's enforced restrictions (such as restricted.containers.lowlevel, restricted.devices.*, and restricted.networks.access). An attacker can exploit this by creating a disallowed or high-privilege instance in an unrestricted project and subsequently moving it into the restricted project.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 03:55 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/canonical/lxd/security/advisor… | vdb-entryvendor-advisory |
| https://github.com/canonical/lxd/pull/18651 | patch |
| https://github.com/canonical/lxd/pull/18605 | patch |
Impacted products
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