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CVE

CVE-2026-86121

Cua computer-server before 0.3.42 Unauthenticated RCE via Desktop Control
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CVE

CVE-2026-86121

Cua computer-server before 0.3.42 Unauthenticated RCE via Desktop Control

Cua computer-server versions before 0.3.42 skip authentication when the CONTAINERNAME 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 runcommand endpoint, read and write arbitrary files through file operation endpoints, and access interactive PTY shells without authentication.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86121.json, https://nvd.nist.gov/vuln/detail/CVE-2026-86121, https://www.vulncheck.com/advisories/cua-computer-server-before-0.3.42-unauthenticated-rce-via-desktop-control, https://github.com/trycua/cua/issues/1892, https://github.com/trycua/cua/commit/59cf25c0ec54, https://github.com/trycua/cua, https://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/computerserver/cli.py, https://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/computerserver/main.py

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.01116%
EPSS Percentile
0.65065%
Introduced Version
0
Fix Available
59cf25c0ec54

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