Full Report
Docker security advisory (AV26–301)
Analysis Summary
# Vulnerability: Docker Desktop Privilege Escalation
## CVE Details
- **CVE ID:** CVE-2026-33990
- **CVSS Score:** Not explicitly listed in advisory (Typically High for Desktop Privilege Escalation)
- **CWE:** Not specified (Likely related to Improper Privilege Management or Path Traversal)
## Affected Systems
- **Products:** Docker Desktop
- **Versions:** All versions prior to 4.67.0
- **Configurations:** Systems running Docker Desktop on Windows, macOS, or Linux where local users have access to the host machine.
## Vulnerability Description
While the brief advisory focuses on the patch release, CVE-2026-33990 identifies a security flaw within Docker Desktop that could allow an attacker to bypass security restrictions. In the context of Docker Desktop, these flaws typically involve the privileged backend services (such as `com.docker.backend` or the Docker Desktop Service) which operate with higher system permissions than the standard user. If exploited, an attacker could potentially execute unauthorized commands or gain elevated privileges on the host operating system.
## Exploitation
- **Status:** Not reported as exploited in the wild at the time of the advisory.
- **Complexity:** Medium (Generally requires local access or a pre-existing foothold on the machine).
- **Attack Vector:** Local (Most Docker Desktop vulnerabilities require the attacker to already have a user account on the target system).
## Impact
- **Confidentiality:** High (Potential access to sensitive host files).
- **Integrity:** High (Potential for unauthorized configuration changes).
- **Availability:** High (Potential for system instability or denial of service).
## Remediation
### Patches
- **Docker Desktop 4.67.0:** Users should update to version 4.67.0 or later immediately to resolve this vulnerability.
### Workarounds
- There are no supported workarounds that provide full mitigation. Restricting non-privileged user access to the Docker socket and ensuring "Allow only trusted users" is configured may reduce the attack surface.
## Detection
- **Indicators of Compromise:** Monitor for unusual child processes spawned by Docker Desktop background services. Look for unauthorized changes to Docker configuration files or service binaries.
- **Detection Methods:** Vulnerability scanners (e.g., Nessus, Qualys) can detect outdated versions of Docker Desktop installed on workstations.
## References
- Docker Security Announcements: hxxps[://]docs[.]docker[.]com/security/security-announcements/
- Canadian Centre for Cyber Security Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/docker-security-advisory-av26-301