What is CVE-2025-62494?

CVE-2025-62494 is a high-severity vulnerability in Quickjs, classified under Incorrect Type Conversion or Cast. CVSS score: 8.8/10. Published 2025-10-16.

How severe is CVE-2025-62494?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Quickjs

CVE-2025-62494

A type confusion vulnerability exists in the handling of the string addition (+) operation within the QuickJS engine. * The code first checks if the left-hand operand is a string. * It then attempts to convert the right-hand opera…

EPSS: 0.005 (37.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Quickjs — versions 2025-04-26
Quickjs_project Quickjs

Weakness classification (CWE)

CWE-704 — Incorrect Type Conversion or Cast

References

cve-coordination@google.com (Release Notes)
cve-coordination@google.com (Exploit, Issue Tracking)

Frequently asked questions

What is CVE-2025-62494?: CVE-2025-62494 is a high-severity vulnerability in Quickjs, classified under Incorrect Type Conversion or Cast. CVSS score: 8.8/10. Published 2025-10-16.
How severe is CVE-2025-62494?: High severity. CVSS v3 base score is 8.8 out of 10.