Soft Machine workspace service: Missing authentication enables cross-tenant file read
Summary
The workspace HTTP service on port 8080 of each sm-ws-* Fly Machine in Soft Machine versions 0.2.247 and prior has no authentication or origin check. Any host that can reach this port over the Fly private network, including other workspaces in the same Fly app or organisation, can read arbitrary files under /workspace and download whole project trees as tar archives. The advisory also reports that a peer workspace may expose platform source code containing a hardcoded database JWT, which could lead to platform-wide data access.
Affected
- Soft Machine versions 0.2.247 and prior
- Endpoints /health, /file/<path> and /archive/<dir> on TCP/8080 of sm-ws-* workspace machines
Fixed in
Unknown.
Workaround
- Restrict workspace-to-workspace traffic on TCP/8080 where possible (third-party guidance, not vendor-confirmed)
- Ask the vendor whether the workspace port can be firewalled between machines in the same Fly app or organisation
Exploitation
- Attack requires network reach to TCP/8080 of a workspace over the Fly private network, not the public internet
- No privileges or user interaction required
- CISA SSVC lists exploitation as PoC and automatable as no; no public exploit has been confirmed by the research notes
- Not listed in CISA KEV at time of research
Our recommendation
- Confirm whether Soft Machine is used and which version runs
- Ask the vendor for the fixed version and the status of related CVE-2026-55176
- Review whether workspaces share a Fly organisation with untrusted parties and restrict traffic between them
- Rotate any database credentials or JWTs that may have been stored in workspace files
- Monitor for unusual requests to port 8080 of workspaces
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- GitHub Advisory GHSA-h6g6-qr45-qmrr github.com
- OpenCVE CVE-2026-46711 app.opencve.io
- HOL CVE-2026-46711 hol.org
- CodeAnt CVE-2026-46711 codeant.ai
- TheHackerWire CVE-2026-46711 www.thehackerwire.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 14:25.
Original description (NVD)
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.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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