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4 vulnerabilities found for SandboxJS by nyariv

CVE-2026-23830 (GCVE-0-2026-23830)

Vulnerability from nvd – Published: 2026-01-27 23:32 – Updated: 2026-01-27 23:32
VLAI?
Title
SandboxJS has Sandbox Escape via Unprotected AsyncFunction Constructor
Summary
SandboxJS is a JavaScript sandboxing library. Versions prior to 0.8.26 have a sandbox escape vulnerability due to `AsyncFunction` not being isolated in `SandboxFunction`. The library attempts to sandbox code execution by replacing the global `Function` constructor with a safe, sandboxed version (`SandboxFunction`). This is handled in `utils.ts` by mapping `Function` to `sandboxFunction` within a map used for lookups. However, before version 0.8.26, the library did not include mappings for `AsyncFunction`, `GeneratorFunction`, and `AsyncGeneratorFunction`. These constructors are not global properties but can be accessed via the `.constructor` property of an instance (e.g., `(async () => {}).constructor`). In `executor.ts`, property access is handled. When code running inside the sandbox accesses `.constructor` on an async function (which the sandbox allows creating), the `executor` retrieves the property value. Since `AsyncFunction` was not in the safe-replacement map, the `executor` returns the actual native host `AsyncFunction` constructor. Constructors for functions in JavaScript (like `Function`, `AsyncFunction`) create functions that execute in the global scope. By obtaining the host `AsyncFunction` constructor, an attacker can create a new async function that executes entirely outside the sandbox context, bypassing all restrictions and gaining full access to the host environment (Remote Code Execution). Version 0.8.26 patches this vulnerability.
Severity ?
10 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
  • CWE-693 - Protection Mechanism Failure
  • CWE-913 - Improper Control of Dynamically-Managed Code Resources
Assigner
References
Impacted products
Vendor Product Version
nyariv SandboxJS Affected: < 0.8.26
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-34146 (GCVE-0-2025-34146)

Vulnerability from nvd – Published: 2025-07-31 14:59 – Updated: 2025-07-31 20:06
VLAI?
Title
nyariv sandboxjs 0.8.23 Prototype Pollution Sandbox Escape DoS
Summary
A prototype pollution vulnerability exists in @nyariv/sandboxjs versions <= 0.8.23, allowing attackers to inject arbitrary properties into Object.prototype via crafted JavaScript code. This can result in a denial-of-service (DoS) condition or, under certain conditions, escape the sandboxed environment intended to restrict code execution. The vulnerability stems from insufficient prototype access checks in the sandbox’s executor logic, particularly in the handling of JavaScript function objects returned.
Severity ?
7 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
Impacted products
Vendor Product Version
nyariv sandboxjs Affected: * , ≤ 0.8.23 (semver)
Create a notification for this product.
Credits
Hagrid29
Show details on NVD website
To clipboard 

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CVE-2026-23830 (GCVE-0-2026-23830)

Vulnerability from cvelistv5 – Published: 2026-01-27 23:32 – Updated: 2026-01-27 23:32
VLAI?
Title
SandboxJS has Sandbox Escape via Unprotected AsyncFunction Constructor
Summary
SandboxJS is a JavaScript sandboxing library. Versions prior to 0.8.26 have a sandbox escape vulnerability due to `AsyncFunction` not being isolated in `SandboxFunction`. The library attempts to sandbox code execution by replacing the global `Function` constructor with a safe, sandboxed version (`SandboxFunction`). This is handled in `utils.ts` by mapping `Function` to `sandboxFunction` within a map used for lookups. However, before version 0.8.26, the library did not include mappings for `AsyncFunction`, `GeneratorFunction`, and `AsyncGeneratorFunction`. These constructors are not global properties but can be accessed via the `.constructor` property of an instance (e.g., `(async () => {}).constructor`). In `executor.ts`, property access is handled. When code running inside the sandbox accesses `.constructor` on an async function (which the sandbox allows creating), the `executor` retrieves the property value. Since `AsyncFunction` was not in the safe-replacement map, the `executor` returns the actual native host `AsyncFunction` constructor. Constructors for functions in JavaScript (like `Function`, `AsyncFunction`) create functions that execute in the global scope. By obtaining the host `AsyncFunction` constructor, an attacker can create a new async function that executes entirely outside the sandbox context, bypassing all restrictions and gaining full access to the host environment (Remote Code Execution). Version 0.8.26 patches this vulnerability.
Severity ?
10 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
  • CWE-693 - Protection Mechanism Failure
  • CWE-913 - Improper Control of Dynamically-Managed Code Resources
Assigner
References
Impacted products
Vendor Product Version
nyariv SandboxJS Affected: < 0.8.26
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-34146 (GCVE-0-2025-34146)

Vulnerability from cvelistv5 – Published: 2025-07-31 14:59 – Updated: 2025-07-31 20:06
VLAI?
Title
nyariv sandboxjs 0.8.23 Prototype Pollution Sandbox Escape DoS
Summary
A prototype pollution vulnerability exists in @nyariv/sandboxjs versions <= 0.8.23, allowing attackers to inject arbitrary properties into Object.prototype via crafted JavaScript code. This can result in a denial-of-service (DoS) condition or, under certain conditions, escape the sandboxed environment intended to restrict code execution. The vulnerability stems from insufficient prototype access checks in the sandbox’s executor logic, particularly in the handling of JavaScript function objects returned.
Severity ?
7 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
Impacted products
Vendor Product Version
nyariv sandboxjs Affected: * , ≤ 0.8.23 (semver)
Create a notification for this product.
Credits
Hagrid29
Show details on NVD website
To clipboard 

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