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CVE-2026-25520
ANC
Critical

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, The return values of functions aren't wrapped. Object.values/Object.entries …

CVSS
10.0
Critical
EPSS
0.00
p17
Published
2026-01-01
Updated
2026-01-01
Description

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, The return values of functions aren't wrapped. Object.values/Object.entries can be used to get an Array containing the host's Function constructor, by using Array.prototype.at you can obtain the hosts Function constructor, which can be used to execute arbitrary code outside of the sandbox. This vulnerability is fixed in 0.8.29.

Tags · CWE
Pre-auth
CWE-74
CAPEC-3
CAPEC-6
CAPEC-7
CAPEC-8
CAPEC-9
CAPEC-10
CAPEC-13
CAPEC-14
CAPEC-24
CAPEC-28
CAPEC-34
CAPEC-42
CAPEC-43
CAPEC-45
CAPEC-46
CAPEC-47
CAPEC-51
CAPEC-52
CAPEC-53
CAPEC-64
CAPEC-67
CAPEC-71
CAPEC-72
CAPEC-76
CAPEC-78
CAPEC-79
CAPEC-80
CAPEC-83
CAPEC-84
CAPEC-101
CAPEC-105
CAPEC-108
CAPEC-120
CAPEC-135
CAPEC-250
CAPEC-267
CAPEC-273
Affected products
Sandboxjs < 0.8.29
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Timeline
2026-01-01
Published
2026-01-01
Updated
CVSS 3.1 breakdown
Attack Vector
AV: N
Network (N)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: N
None (N)
User Interaction
UI: N
None (N)
Scope
S: C
Changed (C)
Confidentiality Impact
C: H
High (H)
Integrity Impact
I: H
High (H)
Availability Impact
A: H
High (H)
Exploit indicators
EPSS
0.001 · p17
Known exploited (KEV)
No
MITRE ATT&CK
Inferred via CAPEC
Known exploits — Сканер-ВС
No Сканер-ВС checks registered for this vulnerability yet.
Affected software
ProductVendorStatus
Tracked
sandboxjs*Tracked