CVE-2026-126329
Docker Sandboxes privilege escalation through untrusted state directories
- High 7.3
Description
Docker Sandboxes reuses existing state and configuration directories without verifying their ownership. If sbx or sandboxd is run as root with HOME or, on Linux, XDG_STATE_HOME pointing to an attacker-controlled location, a local unprivileged user can substitute control-plane sockets and configuration trusted by the root process, potentially executing commands as root. Exploitation requires a privileged invocation with an attacker-influenced environment. The issue affects Linux and macOS and is fixed in version 0.53.0.
Key facts
- Published
- 12 Nov 2026
- Last changed
- 12 Nov 2026
- Assigned by
- Docker
- EPSS
- 0.103% likely to be exploited in the next 30 days, higher than 1.003% of CVEs (scores for 15 Nov 2026)
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 7.3CVSS 4.0, Highfrom the CNA (Docker)
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
What to do
- Upgrade Docker Sandboxes to version 0.53.0 or later.CNA solution statement
- Avoid running sbx or sandboxd as root. If a privileged invocation is required, use HOME and XDG_STATE_HOME values belonging to the target account and ensure its state and configuration directories are not controlled by another user.CNA workaround statement
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Docker | Docker Sandboxes |
|
Timeline
- 12 Nov 2026 Published