GHSA-cfpg-c974-jfhq · Severity: critical · Ecosystem: pip — PySyft server-side arbitrary Python execution after code approval
PySyft (Syft Datasite/Server) versions 0.9.5 and earlier are vulnerable to remote code execution due to insufficient validation and sandboxing of user-submitted code. The system allows low-privileged users to submit Python functions (via @sy.syft_function()) for remote execution on the server. While a code approval mechanism exists, the submitted code undergoes no security checks for dangerous operations (e.g., file access, command execution). Once approved, the code is executed within the server process using exec() and eval() functions without proper isolation. A remote attacker can leverage this to execute arbitrary Python code on the server, leading to complete compromise of the server environment.
Conclusion & alert: CVE-2026-31220 is rated Moderate Risk (55.4/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.63%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.31% | 0.63% | +0.32% |
| 2 | 2026-05-18 | 0.24% | 0.31% | +0.07% |
| 3 | 2026-05-16 | — | 0.24% | — |
Full EPSS history (4 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-cfpg-c974-jfhq · Severity: critical · Ecosystem: pip — PySyft server-side arbitrary Python execution after code approval
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||