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Vulnerability record · CVE-2026-46711 · published 30 September 2026

CVE-2026-46711: Missing authentication for critical function vulnerability

Soft Machine is a Virtual Machine–based agentic development environment / Cloud OS. In versions 0.2.247 and prior, the workspace HTTP service that listens on 0.0.0.0:8080 inside each sm-ws-* Fly Machine exposes endpoints (/health, /file/<path>, /archive/<dir>) without any authentication or origin check. Any host that can reach TCP/8080 on a workspace can read arbitrary files under that workspace's /workspace root and download whole project trees as tar archives. Because every workspace shares the same Fly private 6PN and resolves all peer addresses via the unauthenticated _instances.internal TXT record, every other sm-ws-* machine on the same Fly app/org is a reachable, unauthenticated attacker — the trust boundary (workspace owner ↔ everyone-else) is missing. At time of publication, there are no publicly known patches.

8.3 CVSS 3.1 High CWE-306 · Missing authentication for critical function Deferred
8.3CVSS 3.1 base score
-EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
30 Sep 2026Last modified by NVD

Description

Soft Machine is a Virtual Machine–based agentic development environment / Cloud OS. In versions 0.2.247 and prior, the workspace HTTP service that listens on 0.0.0.0:8080 inside each sm-ws-* Fly Machine exposes endpoints (/health, /file/<path>, /archive/<dir>) without any authentication or origin check. Any host that can reach TCP/8080 on a workspace can read arbitrary files under that workspace's /workspace root and download whole project trees as tar archives. Because every workspace shares the same Fly private 6PN and resolves all peer addresses via the unauthenticated _instances.internal TXT record, every other sm-ws-* machine on the same Fly app/org is a reachable, unauthenticated attacker — the trust boundary (workspace owner ↔ everyone-else) is missing. At time of publication, there are no publicly known patches.

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L

References

LinkTags
https://github.com/Soft-Machine-io/security/security/advisories/GHSA-h6g6-qr45-qmrr
https://github.com/Soft-Machine-io/security/security/advisories/GHSA-h6g6-qr45-qmrr

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Source: NIST National Vulnerability Database (record CVE-2026-46711), CISA KEV, FIRST EPSS. This page is refreshed as NVD updates the record.