CVE-2026-86121: critical vulnerability in trycua cua-computer-server
Cua computer-server before 0.3.42 Unauthenticated RCE via Desktop Control
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 1.1%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
trycua · cua-computer-serverReferences
https://github.com/trycua/cuahttps://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/computer_server/cli.pyhttps://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/computer_server/main.pyhttps://github.com/trycua/cua/commit/59cf25c0ec54https://github.com/trycua/cua/issues/1892https://www.vulncheck.com/advisories/cua-computer-server-before-0.3.42-unauthenticated-rce-via-desktop-control