CVE-2026-25587

critical · 10

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.

CVSS

0.7%

EPSS (exploit prob.)

50th

EPSS percentile

2026-02-06

Published

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

Weaknesses

CWE-94

Affected products

Vendor	Product	Affected versions
nyariv	sandboxjs	< 0.8.29

Check a specific version with /api/v1/cve/match.

References

https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-66h4-qj4x-38xp
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-66h4-qj4x-38xp

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-25587