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CVE-2026-55176: security

Severity

9 (CRITICAL)

Vendor

SOFT-MACHINE-IO

Affected versions

<= 0.2.247

Patch status

Unknown

Published

2026-09-30T17:16:46.630

Modified

2026-09-30T19:57:08.043

Why it matters

This matters because the issue affects identity or token handling. Successful exploitation could allow unauthorized authentication, client manipulation, or access to protected services.

Recommended admin actions

• Prioritize validation immediately due to critical CVSS severity.

Technical summary

Soft Machine is a Virtual Machine–based agentic development environment / Cloud OS. In versions 0.2.247 and prior, two authentication helpers in /app/server.js — verifyContainerAuth() and authenticateWorkspaceHttp() — accept the global CONTAINER_SHARED_SECRET as a bearer token without verifying which workspace the caller belongs to. Because that secret is set identically on every container in the Fly app and is reachable from the user-facing process environment inside each workspace, any tenant can use it to authenticate to any other tenant's workspace API. The result is cross-workspace read, write, and destructive-restore primitives reachable from any paying customer's shell. The existing per-workspace token check (workspaceTokenMatches) protects the user-facing per-workspace token path, but the shared-secret bearer path bypasses it entirely. At time of publication, there are no publicly known patches.

View the official NVD record for CVE-2026-55176

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.