by Kastro
Paper/Archive/CVE-2026-25142

CVE-2026-25142

nyariv SandboxJS — SandboxJS Prototype Pollution -> Sandbox Escape -> RCE

EPSS 1%CVSS 10.0
critical.is priorityof 100
44
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 68.5.685 × 2013.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.27, SanboxJS does not properly restrict __lookupGetter__ which can be used to obtain prototypes, which can be used for escaping the sandbox / remote code execution. This vulnerability is fixed in 0.8.27.

Affected

ProductAffectedFixed inSource
SandboxJS< 0.8.27–CNA

Scores by source

GitHub_M (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/nyariv/SandboxJS/security/advisories/GHSA-9p4w-fq8m-2hp7refgithub.com/nyariv/SandboxJS/commit/75c8009db32e6829b0ad92ca13bf458178442bd3refgithub.com/nyariv/SandboxJS/blob/f212a38fb5a6d4bc2bc2e2466c0c011ce8d41072/src/executor.ts#L368-L398