Use After Free in Quickjs
CVE-2025-62490
In quickjs, in js_print_object, when printing an array, the function first fetches the array length and then loops over it. The issue is, printing a value is not side-effect free. An attacker-defined callback could run during js_print_valu…
Vulnerability class: Use-After-Free
EPSS: 0.004 (29.0th 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)
References
- cve-coordination@google.com (Release Notes)
- cve-coordination@google.com (Exploit, Issue Tracking)
Frequently asked questions
- What is CVE-2025-62490?
- CVE-2025-62490 is a high-severity vulnerability in Quickjs, classified under Use After Free. CVSS score: 8.8/10. Published 2025-10-16.
- How severe is CVE-2025-62490?
- High severity. CVSS v3 base score is 8.8 out of 10.