Vulnerability in Lxc Incus
CVE-2026-23953
Incus is a system container and virtual machine manager. In versions 6.20.0 and below, a user with the ability to launch a container with a custom YAML configuration (e.g a member of the ‘incus’ group) can create an environment variable co…
Vulnerability class: CRLF Injection
EPSS: 0.000 (9.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
Affected products
- Lxc Incus — versions >= 6.1.0, <= 6.20.0, <= 6.0.5
Weakness classification (CWE)
References
- https://github.com/lxc/incus/security/advisories/GHSA-x6jc-phwx-hp32 (x_refsource_CONFIRM)
- https://github.com/lxc/incus/blob/HEAD/internal/server/instance/drivers/driver_lxc.go#L1081 (x_refsource_MISC)
- https://github.com/user-attachments/files/24473682/environment_newline_injection.sh (x_refsource_MISC)
- https://github.com/user-attachments/files/24473685/environment_newline_injection.patch (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-23953?
- CVE-2026-23953 is a high-severity vulnerability in Lxc Incus, classified under CRLF Injection. CVSS score: 8.7/10. Published 2026-01-22.
- How severe is CVE-2026-23953?
- High severity. CVSS v3 base score is 8.7 out of 10.