# QuickJS-NG vulnerabilities

Source: https://junglewise.ai/threats/vendors/quickjs-ng  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 10 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/quickjs-ng.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in QuickJS-NG: 0 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-120440, was published on 2 November 2026. 3 vulnerabilities in the last four weeks, up from none in the four before. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 3
- Last 90 days: 3
- All time: 4 (0 critical, 0 exploited in the wild)

## About QuickJS-NG

QuickJS-NG is an open-source project maintaining a modern fork of the QuickJS Javascript engine.

## Latest QuickJS-NG vulnerabilities

- [CVE-2026-120440: QuickJS-NG memory leak in Atomics.store()](https://junglewise.ai/threats/cve-2026-120440-quickjs-ng-before-0-16-0-contains-a-memory-leak-vulnerability-in) (medium, CVSS 5.3, published 2 Nov 2026)
- [CVE-2026-120439: QuickJS-NG integer overflow in TypedArray sort](https://junglewise.ai/threats/cve-2026-120439-quickjs-ng-before-0-16-0-contains-an-integer-overflow-in-js) (high, CVSS 7, published 2 Nov 2026)
- [CVE-2026-120438: QuickJS-NG integer overflow in Proxy ownKeys enumeration](https://junglewise.ai/threats/cve-2026-120438-quickjs-ng-before-0-16-0-contains-an-integer-overflow-in-js) (high, CVSS 7.8, published 2 Nov 2026)
- [CVE-2026-37630: QuickJS-NG arbitrary code execution in js_mapped_arguments_mark](https://junglewise.ai/threats/cve-2026-37630-quickjs-ng-arbitrary-code-execution-in-js-mapped-arguments-mark) (high, CVSS 7.3, published 11 May 2026)

## Most severe QuickJS-NG vulnerabilities

- [CVE-2026-120438: QuickJS-NG integer overflow in Proxy ownKeys enumeration](https://junglewise.ai/threats/cve-2026-120438-quickjs-ng-before-0-16-0-contains-an-integer-overflow-in-js) (high, CVSS 7.8, published 2 Nov 2026)
- [CVE-2026-37630: QuickJS-NG arbitrary code execution in js_mapped_arguments_mark](https://junglewise.ai/threats/cve-2026-37630-quickjs-ng-arbitrary-code-execution-in-js-mapped-arguments-mark) (high, CVSS 7.3, published 11 May 2026)
- [CVE-2026-120439: QuickJS-NG integer overflow in TypedArray sort](https://junglewise.ai/threats/cve-2026-120439-quickjs-ng-before-0-16-0-contains-an-integer-overflow-in-js) (high, CVSS 7, published 2 Nov 2026)
- [CVE-2026-120440: QuickJS-NG memory leak in Atomics.store()](https://junglewise.ai/threats/cve-2026-120440-quickjs-ng-before-0-16-0-contains-a-memory-leak-vulnerability-in) (medium, CVSS 5.3, published 2 Nov 2026)

## Vulnerabilities per week

3 vulnerabilities in the last four weeks, up from none in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 3 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## QuickJS-NG technologies

- [QuickJS-NG](https://junglewise.ai/threats/technologies/quickjs-ng): 4 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "QuickJS-NG vulnerabilities", https://junglewise.ai/threats/vendors/quickjs-ng, 10 November 2026.