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CVE-2026-25520

🚨 CRITICAL

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 co...

Published
Feb 06, 2026
Last Modified
Feb 06, 2026
Views
13
Bookmarks
0

Description

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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 Scores

CVSS 3.1 10.0
10.0
CRITICAL
CVSS 2.0 10.0

References

github.com github.com github.com

Additional Information

Source
security-advisories@github.com
State
Undergoing analysis

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