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CVE-2025-62410

CVE-2025-62410 · --disallow-code-generation-from-strings is not sufficient for isolating untrusted JavaScript in happy-dom

This page contains facts from public vulnerability sources. Check the original advisory before updating.

In versions before 20.0.2, it was found that --disallow-code-generation-from-strings is not sufficient for isolating untrusted JavaScript in happy-dom. The untrusted script and the rest of the application still run in the same Isolate/process, so attackers can deploy prototype pollution payloads to hijack important references like "process" in the example below, or to hijack control flow via flipping checks of undefined property. This vulnerability is due to an incomplete fix for CVE-2025-61927. The vulnerability is fixed in 20.0.2.

CVSS 9.4 · Critical · EPSS 0.4% · Public exploit · Fix available

Published
Updated

Stack: node

Affected products and versions

  • happy-dom

    Versions
    • < 20.0.2: Affected

    No fix published

  • happy-dom npm

    Affected ranges
    • SEMVER: ≥ 19.0.0, < 20.0.2

    Update to 20.0.2

Original sources

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