CVE-2025-62491 is a Use-After-Free (UAF) vulnerability in the QuickJS engine's standard library, specifically affecting quickjs_project quickjs, that occurs during the iteration of unhandled rejected promises. This vulnerability, rated 8.8 HIGH, allows an attacker to execute arbitrary code by crafting a malicious promise rejection reason that frees memory while it is still being iterated. The attack vector is adjacent, with low complexity and no user interaction required, potentially leading to high confidentiality, integrity, and availability impacts. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2025-09-13CPE matchmatch criteria | cpe:2.3:a:quickjs_project:quickjs:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
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
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.