CVE-2026-23954

HIGH EPSS 49.7%
Published Jan 22, 20265mo ago · Modified Jun 17, 20261w ago
8.7 CVSS 3.1
High
Find Similar
Published Jan 22, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago

Description

Incus is a system container and virtual machine manager. Versions 6.21.0 and below allow a user with the ability to launch a container with a custom image (e.g a member of the ‘incus’ group) to use directory traversal or symbolic links in the templating functionality to achieve host arbitrary file read, and host arbitrary file write. This ultimately results in arbitrary command execution on the host. When using an image with a metadata.yaml containing templates, both the source and target paths are not checked for symbolic links or directory traversal. This can also be exploited in IncusOS. A fix is planned for versions 6.0.6 and 6.21.0, but they have not been released at the time of publication.

CVSS Details

Base Score
8.7
Exploitability
2.3
Impact
5.8
Vector string
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Attack Vector Adjacent
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
49.7% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 2

VendorProductVersionRange
linuxcontainersincus* ≤6.0.5
linuxcontainersincus*≥6.1.0  –  <6.21.0

References 5

  • github.com https://github.com/lxc/incus/blob/HEAD/internal/server/instance/drivers/driver_lxc.go#L7215
    Product
  • github.com https://github.com/lxc/incus/blob/HEAD/internal/server/instance/drivers/driver_lxc.go#L7294
    Product
  • github.com https://github.com/lxc/incus/security/advisories/GHSA-7f67-crqm-jgh7
    ExploitVendor Advisory
  • github.com https://github.com/user-attachments/files/24473599/template_arbitrary_write.sh
    Exploit
  • github.com https://github.com/user-attachments/files/24473601/templates_arbitrary_write.patch
    Patch

Remediation

  • github.com https://github.com/user-attachments/files/24473601/templates_arbitrary_write.patch
    Patch