CVE-2026-23830: SandboxJS has Sandbox Escape via Unprotected AsyncFunction Constructor

January 27, 2026 (updated January 29, 2026)

A sandbox escape vulnerability due to AsyncFunction not being isolated in SandboxFunction

References

github.com/advisories/GHSA-wxhw-j4hc-fmq6
github.com/nyariv/SandboxJS
github.com/nyariv/SandboxJS/commit/345aee6566e47979dee5c337b925b141e7f78ccd
github.com/nyariv/SandboxJS/security/advisories/GHSA-wxhw-j4hc-fmq6
nvd.nist.gov/vuln/detail/CVE-2026-23830

Code Behaviors & Features

Detect and mitigate CVE-2026-23830 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →