CVE-2026-26954

10.0 CRITICAL
Published: March 13, 2026 Modified: March 17, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv
Source: security-advisories@github.com
Vendor Advisory Exploit
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Vendor Advisory Exploit

2 reference(s) from NVD

Quick Stats

CVSS v3 Score
10.0 / 10.0
EPSS (Exploit Probability)
0.1%
19th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

nyariv