Answer in brief
CVE-2026-120438 records a High severity (CVSS 8.5) vulnerability in QuickJS-NG before 0.16.0 Heap Buffer Overflow via Proxy ownKeys Enumeration. The current sources do not mark it as known exploited. The current feed maps quickjs-ng/QuickJS-NG (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps quickjs-ng/QuickJS-NG (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| quickjs-ng/QuickJS-NGgeneric | >=0 <0.16.0 | 0.16.0 |
Published upstream
Nov 2, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 2, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 2, 2026
QuickJS-NG before 0.16.0 contains an integer overflow in js_proxy_get_own_property_names() in quickjs.c that causes a heap buffer overflow on 32-bit hosts. Attackers running JavaScript can return a large array-like object from a Proxy ownKeys trap to wrap the allocation size, causing crashes or potential code execution.
Quoted source text, attributed separately from HOL analysis.