CVE-2026-25520

CRITICAL EPSS 51.4%
Published Feb 6, 20264mo ago · Modified Jun 17, 20262w ago
10.0 CVSS 3.1
Critical
Find Similar
Published Feb 6, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

Description

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, The return values of functions aren't wrapped. Object.values/Object.entries can be used to get an Array containing the host's Function constructor, by using Array.prototype.at you can obtain the hosts Function constructor, which can be used to execute arbitrary code outside of the sandbox. This vulnerability is fixed in 0.8.29.

CVSS Details

Base Score
10.0
Exploitability
3.9
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
51.4% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-74

Affected Products 1

VendorProductVersionRange
nyarivsandboxjs* <0.8.29

References 2

  • github.com https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3
    Patch
  • github.com https://github.com/nyariv/SandboxJS/security/advisories/GHSA-58jh-xv4v-pcx4
    ExploitVendor Advisory

Remediation

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