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CVE-2026-25142

32
FAUCET Score

CVE-2026-25142 is a critical vulnerability affecting the SandboxJS JavaScript sandboxing library prior to version 0.8.27. It allows attackers to bypass the sandbox and achieve remote code execution by exploiting improper restrictions on the __lookupGetter__ function to obtain prototypes. With a CVSS score of 10.0, this vulnerability presents a severe risk due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.8.27CPE matchmatch criteria
cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

10.0CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.09%
Probability of exploitation in next 30 days
EPSS Percentile
62.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0109 is in the 47th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: @nyariv/sandboxjsFixed in: 0.8.27

Vendor Advisories (1)

npmGHSA-9p4w-fq8m-2hp7critical

SandboxJS Vulnerable to Prototype Pollution -> Sandbox Escape -> RCE

Feb 2, 2026

References

github.com / nyariv/SandboxJS/blob/f212a38fb5a6d4bc2bc2e2466c0c011ce8d41072/src/executor.ts
Product
github.com / nyariv/SandboxJS/commit/75c8009db32e6829b0ad92ca13bf458178442bd3
Patch
github.com / nyariv/SandboxJS/security/advisories/GHSA-9p4w-fq8m-2hp7
ExploitVendor Advisory