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CVE-2026-86121

Cua computer-server before 0.3.42 Unauthenticated RCE via Desktop Control

CVSS 4.0 9.3 CRITICALCVSS 3.1 9.8 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-86121

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86121

Published

cua-computer-server

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "trycua",
                    "product": "cua-computer-server",
                    "repo": "https://github.com/trycua/cua",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:pypi/cua-computer-server",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "0.3.42",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON