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TI-2026-58920 Aliases CVE-2026-86121GHSA-pccw-h89v-h9cj

Cua computer-server before 0.3.42 Unauthenticated RCE via Desktop Control

Priority HIGH 81CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01116 66th percentileScored 2026-11-07
Fix Fixed cua-computer-server (trycua): 0.3.42

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
trycuacua-computer-serverbefore 0.3.420.3.42Patch availableCNA
  • cua-computer-server Vendortrycua Affected before 0.3.42 Fixed in 0.3.42 Patch available CNA

Remediation

  • Fix · CNA cua-computer-server (trycua) Fixed in 0.3.42

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86121
  2. 2026-10-03 Alias added: GHSA-pccw-h89v-h9cj

References

Patch 1

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences