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CVE-2026-25142

SandboxJS Prototype Pollution -> Sandbox Escape -> RCE

Published: Feb 2, 2026Updated: Feb 18, 2026 Sources: CVE List NVD GHSACWE-94
10.0CRITICAL
NVD MITRE
EPSS Score
1.1%
Top 37.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-94CWE-1321

Affected Products

nyariv
individual-devaka sandboxjs
SandboxJSOn-prem
Security Products / vuln-mgmt-scanner
npm
package-ecosystem
@nyariv/sandboxjs
OSS Libraries
and 1 more affected products View all →

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/nyariv/SandboxJS/security/advisories/GHSA-9p4w-fq8m-2hp7
github.com
https://github.com/nyariv/SandboxJS/commit/75c8009db32e6829b0ad92ca13bf458178442bd3
github.com
https://github.com/nyariv/SandboxJS/blob/f212a38fb5a6d4bc2bc2e2466c0c011ce8d41072/src/executor.ts#L368-L398
github.com
and 2 more references View all →

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