CVE-2026-0821 is a critical heap-based buffer overflow vulnerability affecting quickjs-ng quickjs up to version 0.11.0, specifically within the js_typed_array_constructor function in quickjs.c. This vulnerability carries a CVSS score of 9.8, indicating a critical severity with a network-based attack vector, low complexity, and potential for complete compromise of confidentiality, integrity, and availability. While not currently listed in CISA's KEV catalog, public exploit disclosure exists, and the vulnerability has garnered some community discussion, though no active exploitation or widely available exploit intelligence (Metasploit, Nuclei, ExploitDB) has been identified. A patch (c5d80831e51e48a83eab16ea867be87f091783c5) is available to remediate this issue.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 0.11.0CPE matchmatch criteria | cpe:2.3:a:quickjs-ng:quickjs:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.