CVSS 3.1
10.0 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HCVE-2026-25520
Critical (10.0) in nyariv sandboxjs. EPSS 0.9% chance of exploitation in the next 30 days. Fixed in @nyariv/sandboxjs 0.8.29.
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.
Severity
- EPSS
- 0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)
- CWE
- CWE-74
- Published
- Modified
- Record from
- the NVD, synced
Affected
- nyariv:sandboxjs
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-58jh-xv4v-pcx4 | npm | @nyariv/sandboxjs | <0.8.29 | 0.8.29 |