Path traversal in Docker Desktop - CVE-2026-17106

Vulnerability identifier: #VU141444

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-17106

CWE-ID: CWE-22

Exploitation vector: Local access

Exploit availability: Public exploit is available

The vulnerability allows a local user to write files outside the intended destination.

The vulnerability exists due to path traversal in docker container cp when copying files to a destination path. A local user can supply a crafted destination path to write files outside the intended destination.

Docker Desktop
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server for SAP Applications 15
HPC Module
SUSE Package Hub 15
openSUSE Leap
openEuler
apptainer
apptainer-suid
apptainer-debuginfo
apptainer-suid-debuginfo
apptainer-sle16
apptainer-leap
apptainer-sle15_6
apptainer-sle15_7
docker-engine

Install security update from vendor's website.

Docker Desktop - update to 4.86.0
apptainer - update to 1.5.3-150600.4.37.1
apptainer-suid - update to 1.5.3-150600.4.37.1
apptainer-debuginfo - update to 1.5.3-150600.4.37.1
apptainer-suid-debuginfo - update to 1.5.3-150600.4.37.1
apptainer-sle16 - update to 1.5.3-150600.4.37.1
apptainer-leap - update to 1.5.3-150600.4.37.1
apptainer-sle15_6 - update to 1.5.3-150600.4.37.1
apptainer-sle15_7 - update to 1.5.3-150600.4.37.1
docker-engine - update to 18.09.0-276

• Exploit #12907 - POC-CopyEscape-CVE-2026-17106 (PoC funcional de CVE-2026-17106 (CopyEscape): carrera TOCTOU en docker cp que permite escritura arbitraria en el host Docker. Laboratorio Docker + monitor inotify + LD_PRELOAD. Variante macOS inocua y Linux destructiva.) (August 14, 2026)

• https://docs.docker.com/security/security-announcements/#docker-desktop-4860-security-update-cve-2026-17106
• https://docs.docker.com/desktop/release-notes/#4860

• Path traversal in Docker Desktop
• SUSE update for apptainer
• openEuler update for docker