CVE-2026-55176: CWE-863: Incorrect Authorization in Soft-Machine-io security
CVE-2026-55176 is a critical authorization vulnerability in Soft Machine versions 0.2.247 and earlier. The issue arises because two authentication helper functions accept a global shared secret as a bearer token without verifying workspace ownership. This allows any tenant with access to the shared secret to authenticate to other tenants' workspace APIs, enabling cross-workspace read, write, and destructive operations. No patches are publicly known at the time of publication.
AI Analysis
Technical Summary
Soft Machine versions 0.2.247 and prior contain an incorrect authorization vulnerability (CWE-863) in the authentication helpers verifyContainerAuth() and authenticateWorkspaceHttp() located in /app/server.js. These functions accept the global CONTAINER_SHARED_SECRET as a bearer token but do not verify the caller's workspace identity. Since the shared secret is identical across all containers and accessible from each workspace's environment, any tenant can use it to authenticate to other tenants' workspace APIs. This bypasses the per-workspace token verification and grants cross-tenant access with read, write, and destructive-restore capabilities. No official patch or fix is currently available.
Potential Impact
An attacker with access to the global shared secret can bypass workspace-specific authorization controls and gain unauthorized access to other tenants' workspace APIs. This results in a complete compromise of confidentiality, integrity, and availability across tenants, including the ability to read, modify, and destructively restore data in other workspaces.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the CONTAINER_SHARED_SECRET environment variable and avoid sharing this secret across multiple tenants. Consider isolating tenant environments to prevent cross-tenant secret exposure.
CVE-2026-55176: CWE-863: Incorrect Authorization in Soft-Machine-io security
Description
CVE-2026-55176 is a critical authorization vulnerability in Soft Machine versions 0.2.247 and earlier. The issue arises because two authentication helper functions accept a global shared secret as a bearer token without verifying workspace ownership. This allows any tenant with access to the shared secret to authenticate to other tenants' workspace APIs, enabling cross-workspace read, write, and destructive operations. No patches are publicly known at the time of publication.
CVSS v3.1
Score 9.0critical
Affected software
Soft-Machine-io
security
pkg:github/soft-machine-io/securityRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Soft Machine versions 0.2.247 and prior contain an incorrect authorization vulnerability (CWE-863) in the authentication helpers verifyContainerAuth() and authenticateWorkspaceHttp() located in /app/server.js. These functions accept the global CONTAINER_SHARED_SECRET as a bearer token but do not verify the caller's workspace identity. Since the shared secret is identical across all containers and accessible from each workspace's environment, any tenant can use it to authenticate to other tenants' workspace APIs. This bypasses the per-workspace token verification and grants cross-tenant access with read, write, and destructive-restore capabilities. No official patch or fix is currently available.
Potential Impact
An attacker with access to the global shared secret can bypass workspace-specific authorization controls and gain unauthorized access to other tenants' workspace APIs. This results in a complete compromise of confidentiality, integrity, and availability across tenants, including the ability to read, modify, and destructively restore data in other workspaces.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the CONTAINER_SHARED_SECRET environment variable and avoid sharing this secret across multiple tenants. Consider isolating tenant environments to prevent cross-tenant secret exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T15:20:43.085Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abd3d882a4e24523d41fc7a
Added to database: 09/30/2026, 16:49:12 UTC
Last enriched: 09/30/2026, 17:03:26 UTC
Last updated: 09/30/2026, 17:57:59 UTC
Views: 5
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