CVE-2026-25881 is a critical sandbox escape vulnerability in SandboxJS versions prior to 0.8.31, affecting the nyariv sandboxjs library. Malicious sandboxed JavaScript code can bypass security controls by manipulating global prototypes, leading to persistent host-side prototype pollution. This flaw carries a CVSS score of 10.0 (CRITICAL) due to its network-based attack vector, low complexity, and potential for complete compromise (RCE) of affected applications. While no active exploitation, public exploit code, or significant community discussion has been observed, the high severity warrants immediate patching to version 0.8.31.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.8.31CPE matchmatch criteria | cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
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.
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.