CVE-2025-62490
HIGH EPSS 29.0%
Published Oct 16, 20258mo ago · Modified Jun 17, 20261w ago
8.8 CVSS 4.0
Published Oct 16, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago
Description
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 Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Adjacent
Attack Complexity High
Privileges Required None
User Interaction P
Scope X
Threat Intelligence
EPSS Exploit Probability
29.0% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available
Weaknesses 1
CWE-416 Use After Free Memory Safety
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| quickjs_project | quickjs | * | <2025-09-13 |
References 2
- bellard.org https://bellard.org/quickjs/Changelog
- issuetracker.google.com https://issuetracker.google.com/434196651
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.