Sandbox Breakout / Arbitrary Code Execution in localeval
Priority LOW 38Published · Updated
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
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- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub.
Summary
All versions of `localeval` are vulnerable to Sandbox Escape leading to Remote Code Execution. The package fails to restrict access to the main context through `constructor.constructor`. This may allow attackers to execute arbitrary code in the system. Evaluating the payload ``` constructor.constructor("return process.env")() ``` returns the contents of `process.env`. ## Recommendation No fix is currently available. Consider using an alternative package until a fix is made available.
Why it matters now
Fix Fixed localeval (npm): 15.3.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | localeval (npm) | before 15.3.0 | 15.3.0 | Patch available | GHSA-mmqv-m45h-q2hp |
- localeval (npm) Vendor— Affected before 15.3.0 Fixed in 15.3.0 Patch available GHSA-mmqv-m45h-q2hp
Remediation
- Fix · GHSA-mmqv-m45h-q2hp localeval (npm) Fixed in 15.3.0 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-mmqv-m45h-q2hp
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences