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SCA: security update for @nyariv/sandboxjs (GHSA-wxhw-j4hc-fmq6)

critical Tenable Cloud Security Plugin ID 437248

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - SandboxJS is a JavaScript sandboxing library. Versions prior to 0.8.26 have a sandbox escape vulnerability
 due to `AsyncFunction` not being isolated in `SandboxFunction`. The library attempts to sandbox code
 execution by replacing the global `Function` constructor with a safe, sandboxed version
 (`SandboxFunction`). This is handled in `utils.ts` by mapping `Function` to `sandboxFunction` within a map
 used for lookups. However, before version 0.8.26, the library did not include mappings for
 `AsyncFunction`, `GeneratorFunction`, and `AsyncGeneratorFunction`. These constructors are not global
 properties but can be accessed via the `.constructor` property of an instance (e.g., `(async () =>
 {}).constructor`). In `executor.ts`, property access is handled. When code running inside the sandbox
 accesses `.constructor` on an async function (which the sandbox allows creating), the `executor` retrieves
 the property value. Since `AsyncFunction` was not in the safe-replacement map, the `executor` returns the
 actual native host `AsyncFunction` constructor. Constructors for functions in JavaScript (like `Function`,
 `AsyncFunction`) create functions that execute in the global scope. By obtaining the host `AsyncFunction`
 constructor, an attacker can create a new async function that executes entirely outside the sandbox
 context, bypassing all restrictions and gaining full access to the host environment (Remote Code
 Execution). Version 0.8.26 patches this vulnerability. (CVE-2026-23830)

See Also

https://github.com/advisories/GHSA-wxhw-j4hc-fmq6

Plugin Details

Severity: Critical

ID: 437248

Version: Revision 1.10

Type: Local

Family: SCA Checks

Published: 1/28/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: High

Score: 7.7

Percentile: 99.07

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-23830

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/27/2026

Vulnerability Publication Date: 1/27/2026

Reference Information

CVE: CVE-2026-23830