CVE-2026-26954CRITICAL 10.0EPSS p42.8%

CVE-2026-26954CVE-2026-26954

Description

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.

Scoring

CVSS 3.110.0 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS0.55% probability of exploitation · percentile 42.8% · 2026-08-03T12:00:16Z
Published2026-03-13
Last modified2026-03-17

Underlying weaknesses· 1

CWE-94

References

  1. https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv
  2. https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv

1

TypeTargetConfidenceTier
WeaknessImproper Control of Generation of Code ('Code Injection')cwe-940%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.