CVE-2026-25520

CRITICAL

10.0

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.

CVE Details

CVSS v3.1 Score10.0

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/6/2026

Last Modified2/18/2026

Sourcenvd

Honeypot Sightings0

Affected Products

nyariv:sandboxjs

Weaknesses (CWE)

CWE-74

References

https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3(security-advisories@github.com)

https://github.com/nyariv/SandboxJS/security/advisories/GHSA-58jh-xv4v-pcx4(security-advisories@github.com)

https://github.com/nyariv/SandboxJS/security/advisories/GHSA-58jh-xv4v-pcx4(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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