Cua computer-server before 0.3.42 Unauthenticated RCE via Desktop Control
Published Sep 5, 2026
9.3
CRITICALCVSS 4.0
EPSS 1.12%
Description
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.
Affected products
-
- Version 0StatusaffectedConstraints<0.3.42
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Trycua | Cua-Computer-Server | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
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
1 other source (NVD) ▾
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Sep 8, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.12% (0.01116) | 64.89th | v5 (v2026.06.15) |
| Sep 6, 2026 | 0.59% (0.00592) | 46.14th | v5 (v2026.06.15) |
References (6)
- https://github.com/trycua/cua product
- https://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/computer_server/cli.py technical-description
- https://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/computer_server/main.py technical-description
- https://github.com/trycua/cua/commit/59cf25c0ec54 patch
- https://github.com/trycua/cua/issues/1892 exploitissue-tracking
- https://www.vulncheck.com/advisories/cua-computer-server-before-0.3.42-unauthenticated-rce-via-desktop-control third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/trycua/cua | product | |
| https://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/computer_server/cli.py | technical-description | |
| https://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/computer_server/main.py | technical-description | |
| https://github.com/trycua/cua/commit/59cf25c0ec54 | patch | |
| https://github.com/trycua/cua/issues/1892 | exploitissue-tracking | |
| https://www.vulncheck.com/advisories/cua-computer-server-before-0.3.42-unauthenticated-rce-via-desktop-control | third-party-advisory |
Change history (0)
No recorded changes yet.