Buffer overflow in Quickjs-ng Quickjs
CVE-2026-0821
A vulnerability was determined in quickjs-ng quickjs up to 0.11.0. This vulnerability affects the function js_typed_array_constructor of the file quickjs.c. Executing a manipulation can lead to heap-based buffer overflow. The attack may be…
Vulnerability class: Buffer Overflow
EPSS: 0.002 (38.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Quickjs-ng Quickjs — versions 0.1, 0.2, 0.3
Weakness classification (CWE)
References
- VDB-340355 | quickjs-ng quickjs quickjs.c js_typed_array_constructor heap-based overflow (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-340355 | CTI Indicators (IOB, IOC, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #731780 | quickjs-ng quickjs v0.11.0 Heap-based Buffer Overflow (Third Party Advisory, VDB Entry, third-party-advisory)
- cna@vuldb.com (issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
- cna@vuldb.com (issue-tracking, Issue Tracking)
- cna@vuldb.com (issue-tracking, Exploit, exploit, Issue Tracking, Vendor Advisory)
- cna@vuldb.com (Patch, patch)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-0821?
- CVE-2026-0821 is a high-severity vulnerability in Quickjs-ng Quickjs, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.3/10. Published 2026-01-10.
- How severe is CVE-2026-0821?
- High severity. CVSS v3 base score is 7.3 out of 10.