VULNERABILITY INTELLIGENCE
CVE-2026-86121
CVSS score9.3 CRITICAL
EPSS probability1.12%
CISA KEVNot currently listed
Published2026-09-05
Last modified2026-09-24
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Description
Cua computer-server versions before 0.3.42 skip authentication when the CONTAINER_NAME environment variable is unset and bind to all interfaces by default, allowing unauthenticated attackers to execute arbitrary commands. Attackers can reach TCP port 8000 to run shell commands via the run_command endpoint, read and write arbitrary files through file operation endpoints, and access interactive PTY shells without authentication.
Weakness classification
- CWE-306: Missing Authentication for Critical Function