CVE•Published 2026-05-28•Modified 2026-05-28•1 article on news•5 live references•NVD data
CVE-2026-43898Nyariv · Sandboxjs
Vulnerability data via NVD (ingested)
CVSS v3.1
10.0
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS percentile
—
Weaknesses (CWE)
Description
SandboxJS is a JavaScript sandboxing library. Prior to 0.9.6, sandbox-defined functions expose Function.caller, allowing sandboxed code to recover the internal LispType.Call runtime callback. That callback can then be invoked with attacker-controlled fake context and obj values to extract blocked host statics, recover the real host Function constructor, and execute arbitrary host JavaScript. This vulnerability is fixed in 0.9.6.
Timeline
Published 2026-05-28
Modified 2026-05-28
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-43898Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Nyariv Sandboxjs"All exposed Nyariv Sandboxjs instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Sandboxjs"HTTP body or banner mentions "Sandboxjs" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-43898Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-43898Censys host search filtered to this CVE id.
grep.app
CVE-2026-43898Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-43898GitHub code search for direct mentions.
Google dork
"CVE-2026-43898" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.