GHSA-x6jc-phwx-hp32 · Severity: high · Ecosystem: go — Incus container environment configuration newline injection
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 containing newlines, which can be used to add additional configuration items in the container’s lxc.conf due to newline injection. This can allow adding arbitrary lifecycle hooks, ultimately resulting in arbitrary command execution on the host. Exploiting this issue on IncusOS requires a slight modification of the payload to change to a different writable directory for the validation step (e.g /tmp). This can be confirmed with a second container with /tmp mounted from the host (A privileged action for validation only). A fix is planned for versions 6.0.6 and 6.21.0, but they have not been released at the time of publication.
Conclusion & alert: CVE-2026-23953 is rated Exploit Available (50.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.01%). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-01-23 | — | 0.01% | — |
Full EPSS history (1 record total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.7 | 3.1 | HIGH |
|
2.3 | 5.8 | [email protected] |
GHSA-x6jc-phwx-hp32 · Severity: high · Ecosystem: go — Incus container environment configuration newline injection
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2026-23953: 2 source package rows (incus, incus-feature); 29 state rows across 2 repos (3.23-community, edge-community); fixed 9, open 20. | https://security.alpinelinux.org/vuln/CVE-2026-23953 |
debian
|
not yet assigned | CVE-2026-23953 not yet assigned priority: Debian including 2 source packages (incus, lxd), 5 status rows across 4 suites (bookworm, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-23953 |
ubuntu
|
medium | CVE-2026-23953 medium priority: Ubuntu including 2 source packages (incus, lxd), 11 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): needs-triage 6, DNE 4, released 1. | https://ubuntu.com/security/CVE-2026-23953 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| linuxcontainers | incus | <= 6.0.5 | cpe:2.3:a:linuxcontainers:incus:*:*:*:*:*:*:*:* |
| linuxcontainers | incus | >= 6.1.0, < 6.21.0 | cpe:2.3:a:linuxcontainers:incus:*:*:*:*:*:*:*:* |