cve.bz

CVE-2026-26954

10.0 criticalEPSS 0.6%

Critical (10.0) in nyariv sandboxjs. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in @nyariv/sandboxjs 0.8.34.

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.34, it is possible to obtain arrays containing Function, which allows escaping the sandbox. Given an array containing Function, and Object.fromEntries, it is possible to construct {[p]: Function} where p is any constructible property. This vulnerability is fixed in 0.8.34.

Severity

CVSS 3.1

10.0 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS
0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-11-01)
CWE
CWE-94
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-6r9f-759j-hjgvnpm@nyariv/sandboxjs<0.8.340.8.34

References

Check your stackJSON