CVE-2026-25587

Published: Feb 6, 2026Modified: Jun 17, 2026

10.0

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 6.0

Source: security-advisories@github.com (Secondary)

Description

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, as Map is in SAFE_PROTOYPES, it's prototype can be obtained via Map.prototype. By overwriting Map.prototype.has the sandbox can be escaped. This vulnerability is fixed in 0.8.29.

Affected (1)

Products: Nyariv: Sandboxjs

Nyariv

1 product

Sandboxjs

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Nyariv Sandboxjs	Before 0.8.29

Related CWEs

CWE-94

Improper Control of Generation of Code ('Code Injection')

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

References (3)

https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3

Source: security-advisories@github.com

Patch

https://github.com/nyariv/SandboxJS/security/advisories/GHSA-66h4-qj4x-38xp

Source: security-advisories@github.com

ExploitVendor Advisory

https://github.com/nyariv/SandboxJS/security/advisories/GHSA-66h4-qj4x-38xp

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitVendor Advisory

Timeline

No history available yet.