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Vulnerability Details :

CVE-2026-34217

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-06 Apr, 2026 | 15:12
Updated At-06 Apr, 2026 | 15:40
Rejected At-
Credits

SandboxJS has a Sandbox Escape via Prop Object Leak in New Handler

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.36, a scope modification vulnerability exists in @nyariv/sandboxjs. The vulnerability allows untrusted sandboxed code to leak internal interpreter objects through the new operator, exposing sandbox scope objects in the scope hierarchy to untrusted code; an unexpected and undesired exploit. While this could allow modifying scopes inside the sandbox, code evaluation remains sandboxed and prototypes remain protected throughout the execution. This vulnerability is fixed in 0.8.36.

Vendors
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Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:06 Apr, 2026 | 15:12
Updated At:06 Apr, 2026 | 15:40
Rejected At:
▼CVE Numbering Authority (CNA)
SandboxJS has a Sandbox Escape via Prop Object Leak in New Handler

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.36, a scope modification vulnerability exists in @nyariv/sandboxjs. The vulnerability allows untrusted sandboxed code to leak internal interpreter objects through the new operator, exposing sandbox scope objects in the scope hierarchy to untrusted code; an unexpected and undesired exploit. While this could allow modifying scopes inside the sandbox, code evaluation remains sandboxed and prototypes remain protected throughout the execution. This vulnerability is fixed in 0.8.36.

Affected Products
Vendor
nyariv
Product
SandboxJS
Versions
Affected
  • < 0.8.36
Problem Types
TypeCWE IDDescription
CWECWE-668CWE-668: Exposure of Resource to Wrong Sphere
Type: CWE
CWE ID: CWE-668
Description: CWE-668: Exposure of Resource to Wrong Sphere
Metrics
VersionBase scoreBase severityVector
4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w
x_refsource_CONFIRM
Hyperlink: https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w
Resource:
x_refsource_CONFIRM
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w
exploit
Hyperlink: https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w
Resource:
exploit
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:06 Apr, 2026 | 16:16
Updated At:09 Apr, 2026 | 18:03

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.36, a scope modification vulnerability exists in @nyariv/sandboxjs. The vulnerability allows untrusted sandboxed code to leak internal interpreter objects through the new operator, exposing sandbox scope objects in the scope hierarchy to untrusted code; an unexpected and undesired exploit. While this could allow modifying scopes inside the sandbox, code evaluation remains sandboxed and prototypes remain protected throughout the execution. This vulnerability is fixed in 0.8.36.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.17.2HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Type: Secondary
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 7.2
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CPE Matches

nyariv
nyariv
>>sandboxjs>>Versions before 0.8.36(exclusive)
cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:*
Weaknesses
CWE IDTypeSource
CWE-668Primarysecurity-advisories@github.com
CWE ID: CWE-668
Type: Primary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96wsecurity-advisories@github.com
Exploit
Mitigation
Vendor Advisory
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Mitigation
Vendor Advisory
Hyperlink: https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w
Source: security-advisories@github.com
Resource:
Exploit
Mitigation
Vendor Advisory
Hyperlink: https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Mitigation
Vendor Advisory

Change History

0
Information is not available yet

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