{"id":"CVE-2026-55176","published":"2026-09-30T17:16:46.630","lastModified":"2026-10-02T17:17:06.177","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.","cvssScore":9,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwes":["CWE-863"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj","tags":[]},{"url":"https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj","tags":[]}],"exploitRefs":[{"url":"https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj","tags":[]},{"url":"https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj","tags":[]}],"hasPoc":true,"ai":{"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.","remediation":"Upgrade to version 0.2.248 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","api","workspace","secret"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-02T08:47:02.601Z"}}