CVE-2026-86121
Cua computer-server before 0.3.42 Unauthenticated RCE via Desktop Control
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-306 |
| Vendor | trycua |
| Product | cua-computer-server |
| Published | Sep 5, 2026 |
| Last Updated | Sep 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
trycua / cua-computer-server
0 < 0.3.42
References
github.com: https://github.com/trycua/cua/issues/1892 github.com: https://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/computer_server/main.py github.com: https://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/computer_server/cli.py github.com: https://github.com/trycua/cua/commit/59cf25c0ec54 github.com: https://github.com/trycua/cua vulncheck.com: https://www.vulncheck.com/advisories/cua-computer-server-before-0.3.42-unauthenticated-rce-via-desktop-control
Credits
🔍 George Chen