SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, a sandbox escape is possible by shadowing hasOwnProperty on a sandbox object, which disables prototype whitelist enforcement in the property-access path. This permits direct access to __proto__ and other blocked prototype properties, enabling host Object.prototype pollution and persistent cross-sandbox impact. This vulnerability is fixed in 0.8.29.
References
| Link | Resource |
|---|---|
| https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3 | Patch |
| https://github.com/nyariv/SandboxJS/security/advisories/GHSA-jjpw-65fv-8g48 | Exploit Vendor Advisory |
| https://github.com/nyariv/SandboxJS/security/advisories/GHSA-jjpw-65fv-8g48 | Exploit Vendor Advisory |
Configurations
History
18 Feb 2026, 14:32
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:* | |
| References | () https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3 - Patch | |
| References | () https://github.com/nyariv/SandboxJS/security/advisories/GHSA-jjpw-65fv-8g48 - Exploit, Vendor Advisory | |
| First Time |
Nyariv sandboxjs
Nyariv |
06 Feb 2026, 21:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/nyariv/SandboxJS/security/advisories/GHSA-jjpw-65fv-8g48 - |
06 Feb 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-02-06 20:16
Updated : 2026-02-18 14:32
NVD link : CVE-2026-25586
Mitre link : CVE-2026-25586
CVE.ORG link : CVE-2026-25586
JSON object : View
Products Affected
nyariv
- sandboxjs
CWE
CWE-74
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')