CVE-2026-55176

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{"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": "2026-10-02T17:17:06.177", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55176", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-02T16:22:21.804846Z", "version": "2.0.3"}}]}, "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"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "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": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.2.247]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "security", "source": "cna", "vendor": "Soft-Machine-io"}, "product": "security", "vendor": "soft-machine-io"}], "created": "2026-09-30T20:15:05.603992+00:00", "updated": "2026-10-01T11:30:05.530325+00:00", "vendors": ["soft-machine-io", "soft-machine-io$PRODUCT$security"]}