by Kastro
Paper/Archive/CVE-2026-24002

CVE-2026-24002

gristlabs grist-core — pyodide sandbox option is insecure

EPSS 0.5%CVSS 9.6
critical.is priorityof 100
38
CVSS 9.6 (NVD)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 44.2.442 × 208.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Grist is spreadsheet software using Python as its formula language. Grist offers several methods for running those formulas in a sandbox, for cases where the user may be working with untrusted spreadsheets. One such method runs them in pyodide, but pyodide on node does not have a useful sandbox barrier. If a user of Grist sets `GRIST_SANDBOX_FLAVOR` to `pyodide` and opens a malicious document, that document could run arbitrary processes on the server hosting Grist. The problem has been addressed in Grist version 1.7.9 and up, by running pyodide under deno. As a workaround, a user can use the gvisor-based sandbox by setting `GRIST_SANDBOX_FLAVOR` to `gvisor`.

Affected

ProductAffectedFixed inSource
grist-core< 1.7.9–CNA

Scores by source

NVD9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
GitHub_M (CNA)9.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/gristlabs/grist-core/security/advisories/GHSA-7xvx-8pf2-pv5grefsupport.getgrist.com/self-managed/#how-do-i-sandbox-documents