What is CVE-2025-62410?

CVE-2025-62410 is a vulnerability in Capricorn86 Happy-dom, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). Published 2025-10-15.

Is CVE-2025-62410 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Prototype Pollution in Capricorn86 Happy-dom

CVE-2025-62410

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/proc…

Vulnerability class: Prototype Pollution

EPSS: 0.001 (33.3th percentile) — read the EPSS interpretation.

Affected products

Capricorn86 Happy-dom — versions < 20.0.2

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

https://github.com/capricorn86/happy-dom/security/advisories/GHSA-qpm2-6cq5-7pq5 (x_refsource_CONFIRM)
https://github.com/capricorn86/happy-dom/commit/f4bd4ebe3fe5abd2be2bcea1c07043c8b0b70eea (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-62410?: CVE-2025-62410 is a vulnerability in Capricorn86 Happy-dom, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). Published 2025-10-15.
Is CVE-2025-62410 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.