{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55176", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-16T15:20:43.085Z", "datePublished": "2026-09-30T16:30:42.729Z", "dateUpdated": "2026-09-30T16:30:42.729Z"}, "containers": {"cna": {"title": "Soft Machine: Cross-tenant workspace API auth bypass via shared `CONTAINER_SHARED_SECRET` bearer token", "problemTypes": [{"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj"}], "affected": [{"vendor": "Soft-Machine-io", "product": "security", "versions": [{"version": "<= 0.2.247", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-30T16:30:42.729Z"}, "descriptions": [{"lang": "en", "value": "Soft Machine is a Virtual Machine\u2013based agentic development environment / Cloud OS. In versions 0.2.247 and prior, two authentication helpers in /app/server.js \u2014 verifyContainerAuth() and authenticateWorkspaceHttp() \u2014 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."}], "source": {"advisory": "GHSA-63gh-vp9f-vxhj", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "security", "vendor": "Soft-Machine-io", "versions": [{"status": "affected", "version": "<= 0.2.247"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Soft Machine is a Virtual Machine\u2013based agentic development environment / Cloud OS. In versions 0.2.247 and prior, two authentication helpers in /app/server.js \u2014 verifyContainerAuth() and authenticateWorkspaceHttp() \u2014 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."}], "id": "CVE-2026-55176", "lastModified": "2026-09-30T19:57:08.043", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 6.0, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-30T17:16:46.630", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-09-30T20:15:05.603992+00:00", "updated": "2026-09-30T20:15:05.603998+00:00", "vendors": []}