CVE-2026-55176

9 CRITICALpublic exploit available

Published 2026-09-30 · Updated 2026-10-02

AI risk analysis

Summary: The flaw allows any tenant to use a shared secret to authenticate to any other tenant's workspace API, enabling cross-workspace read, write, and destructive operations.
Exploitability: Exploitation is relatively easy as the shared secret is accessible from the user-facing process environment, requiring only knowledge of the secret and the API endpoint.
Blast radius: If exploited, this flaw could lead to complete compromise of multiple workspaces, allowing unauthorized access and potential data destruction.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to version 0.2.248 or later.

auth-bypassapiworkspacesecret

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

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.

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-863

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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