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_value, during which the array could get resized and len1 become out of bounds. This results in a use-after-free.A second instance occurs in the same function during printing of a map or set objects. The code iterates over ms->records list, but once again, elements could be removed from the list during js_print_value call.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://bellard.org/quickjs/Changelog	Release Notes
https://issuetracker.google.com/434196651	Exploit Issue Tracking

Configurations

Configuration 1 (hide)

cpe:2.3:a:quickjs_project:quickjs:*:*:*:*:*:*:*:*

History

30 Oct 2025, 16:29

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.8
References	~~() https://bellard.org/quickjs/Changelog -~~	() https://bellard.org/quickjs/Changelog - Release Notes
References	~~() https://issuetracker.google.com/434196651 -~~	() https://issuetracker.google.com/434196651 - Exploit, Issue Tracking
CPE		cpe:2.3:a:quickjs_project:quickjs::::::::
First Time		Quickjs Project quickjs Quickjs Project

16 Oct 2025, 16:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-10-16 16:15

Updated : 2025-10-30 16:29

NVD link : CVE-2025-62490

Mitre link : CVE-2025-62490

CVE.ORG link : CVE-2025-62490

JSON object : View

Products Affected

quickjs_project

quickjs

CWE

CWE-416

Use After Free

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