{"schema":"threatline.record/2","record":{"id":"CVE-2026-55176","aliases":["GHSA-63gh-vp9f-vxhj"],"summary":"Soft Machine: Cross-tenant workspace API auth bypass via shared `CONTAINER_SHARED_SECRET` bearer token","details":"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.","categories":["Unclassified"],"product":"security","vendor":"Soft-Machine-io","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-55176","source_modified_at":"2026-10-02T16:22:50.416Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"security","vendor":"Soft-Machine-io","versions":[{"status":"affected","version":"<= 0.2.247"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj","source_modified_at":"2026-07-02T19:54:44Z","fetched_at":"2026-10-24T00:31:04.721601Z","package":{"name":"security","ecosystem":null},"range":"1.0"}],"fixed_versions":[],"cvss":9,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00198,"percentile":0.09064,"score_date":"2026-10-23"},"published_at":"2026-09-30T16:30:42.729Z","modified_at":"2026-10-02T16:22:50.416Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-55176","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-02T16:22:50.416Z"},{"source":"GitHub Advisory Database","url":"https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj","fetched_at":"2026-10-24T00:31:04.721601Z","source_modified_at":"2026-07-02T19:54:44Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-55176","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/Soft-Machine-io/security/security/advisories/GHSA-63gh-vp9f-vxhj","tags":["exploit"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"total","assessed_at":"2026-10-02T16:22:21.804846Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-02T16:22:50.416Z","content_hash":"78bd9569328c31f685f9cd76e06561334e667276ddc48b75414c2f0d5c982a79"}}