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CVE-2026-23954— Incus container image templating arbitrary host file read and write

Quick assessment

Affected
lxc incus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Incus是LXC开源的一个系统容器和虚拟机管理器。 Incus 6.21.0及之前版本存在路径遍历漏洞，该漏洞源于模板功能中存在目录遍历或符号链接问题，可能导致主机任意文件读写和任意命令执行。

CVSS 8.7 · High EPSS 0.79% · P55
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I. Basic Information for CVE-2026-23954

Vulnerability Information
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Vulnerability Title
Incus container image templating arbitrary host file read and write
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Incus 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Incus是LXC开源的一个系统容器和虚拟机管理器。 Incus 6.21.0及之前版本存在路径遍历漏洞，该漏洞源于模板功能中存在目录遍历或符号链接问题，可能导致主机任意文件读写和任意命令执行。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
lxc incus >= 6.1.0, <= 6.20.0 -

II. Public POCs for CVE-2026-23954

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III. Intelligence Information for CVE-2026-23954

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Patches & Fixes for CVE-2026-23954 (1)

Other References for CVE-2026-23954 (3)

IV. Related Vulnerabilities

Same product: incus
Same vendor: lxc
Same weakness: CWE-22

V. Comments for CVE-2026-23954

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