Vulnerability Report

CVE-2026-26954

RCE

Title: SandboxJS sandbox escape via Function array

RCE

Proof Of Concept

No public PoC currently indexed for CVE-2026-26954.

CWE Category CWE-94
Published Date Mar 13, 2026
Modified Date Mar 17, 2026
Exploit Status Not Found
Score 10.0 CVSS v3.1
Exploit Probability (EPSS)
0.55%

Vulnerability Summary

CVE-2026-26954: SandboxJS is a JavaScript sandboxing library. Prior to 0.8.34, it is possible to obtain arrays containing Function, which allows escaping the sandbox. Given an array containing Function, and Object.fromEntries, it is possible to construct {[p]: Function} where p is any constructible property. This vulnerability is fixed in 0.8.34.

Impacted Vendors

N
nyariv 1

Reference Links

https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
10.0
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-26954 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected Stack

No specific products linked.