CVE-2026-26954
SandboxJS has a Sandbox Escape
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.
INFO
Published Date :
March 13, 2026, 7:54 p.m.
Last Modified :
March 17, 2026, 8:13 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | MITRE-CVE | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update SandboxJS to version 0.8.34 or later.
- Apply vendor-provided patches.
- Review sandbox configurations.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-26954.
| URL | Resource |
|---|---|
| https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv | Vendor Advisory Exploit |
| https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv | Vendor Advisory Exploit |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-26954 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-26954
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-26954 vulnerability anywhere in the article.
-
Daily CyberSecurity
High-Severity Flaw Exposes LiteSpeed Web Servers to OS Command Injection
A significant security warning has been issued for administrators utilizing LiteSpeed Web Server, a popular high-performance replacement for Apache. According to a vulnerability note from JPCERT/CC, a ... Read more
-
Daily CyberSecurity
Critical 10.0 CVSS SandboxJS Flaw Grants Complete Remote Code Execution
A severe security flaw has been identified in SandboxJS, a popular JavaScript sandboxing library used to safely execute untrusted code within web and Node.js applications. The vulnerability, tracked a ... Read more
-
Daily CyberSecurity
Weekly Threat Intelligence Briefing: Chrome Zero-Days, SolarWinds RCE, and a Surge in Critical PoCs
The Executive Summary Over the past seven days, our CVE Watchtower intercepted 1,388 new vulnerabilities, highlighting a relentless week in the cybersecurity landscape. While the sheer volume is high, ... Read more
The following table lists the changes that have been made to the
CVE-2026-26954 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 17, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:* versions up to (excluding) 0.8.34 Added Reference Type GitHub, Inc.: https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 16, 2026
Action Type Old Value New Value Added Reference https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv -
New CVE Received by [email protected]
Mar. 13, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-94 Added Reference https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv