Authentication Flaw in Soft Machine Cloud OS Allows Unauthorized Access
CVE-2026-55176

9CRITICAL

Key Information:

Vendor

Soft-machine-io

Status
Security
Vendor
CVE Published:
30 September 2026

What is CVE-2026-55176?

The Soft Machine Cloud OS has a significant security vulnerability in its authentication process. In version 0.2.247 and earlier, two functions, verifyContainerAuth() and authenticateWorkspaceHttp(), improperly accept the global CONTAINER_SHARED_SECRET as a bearer token without confirming the caller's workspace association. This flaw allows any tenant to authenticate against another tenant's workspace API, facilitating unrestricted read, write, and destructive actions across workspaces. Although there is a token check in place for per-workspace interactions, it does not apply to the shared-secret authentication path, leaving all containers vulnerable. There are currently no known patches available to mitigate this risk.

Affected Version(s)

security <= 0.2.247

References

https://github.com/Soft-Machine-io/security/security/advi...
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CVSS V3.1

Score:
9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.