{"id":"CVE-2026-55176","title":"Soft Machine is a Virtual Machine–based agentic development environment / Cloud OS","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 C…","severity":"critical","cvss":9,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-863"],"vendor":"Soft-Machine-io","product":"security","affected":["security <= 0.2.247"],"published":"2026-09-30","updated":"2026-10-02","sourceUpdated":"2026-10-02T17:17:06.177","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55176","references":[{"url":"https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj","label":"security-advisories@github.com"},{"url":"https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-10-02T16:22:21.804846Z"},"epss":0.00288,"epssPercentile":0.21266,"ingestedAt":"2026-09-30T17:13:20.838Z","slug":"CVE-2026-55176","body":"## Overview\n\nSoft 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":62,"depthScoreParts":{"impact":49.5,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":215011,"id":"CVE-2026-55176","ts":1790961882693,"field":"exploit_available","old":"false","new":"true"}]}