CVE-2026-25142
SandboxJS Prototype Pollution -> Sandbox Escape -> RCE
CVSS v3
10
CRITICAL
EPSS Score
1.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
none
SSVC status
Description
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.
Technical details
- Published
- 2026-02-02
- Last Modified
- 2026-02-18
Frequently asked questions
What is CVE-2026-25142?
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.
Is CVE-2026-25142 actively exploited?
Active exploitation of CVE-2026-25142 has not been confirmed. Its EPSS score was 1.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-25142?
CVE-2026-25142 has a CVSS v3 base score of 10 (CRITICAL severity).
Is CVE-2026-25142 affecting your environment?
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