CVE-2026-120440
mediumQuickJS-NG before 0.16.0 contains a memory leak vulnerability in js_atomics_store() in quickjs.c that fails to free the converted value when returning a RangeE…
QuickJS-NG before 0.16.0 contains a memory leak vulnerability in js_atomics_store() in quickjs.c that fails to free the converted value when returning a RangeError. Attackers running JavaScript can repeatedly call Atomics.store with a valueOf that detaches or shrinks the buffer to exhaust heap memory and cause denial of service.
CVSS
5.3
5.3 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)
Timeline (UTC)
Published: 2026-11-02 15:17
Modified: 2026-11-02 19:34
NVD status: Awaiting Analysis
Last synced 1 day ago
Verified against the source API 2026-11-03 07:35 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L61154 disclosure@vulncheck.com
- https://github.com/quickjs-ng/quickjs/commit/62951e1bc68711d37aad986ff84ef0fe17038a7e disclosure@vulncheck.com
- https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0 disclosure@vulncheck.com
- https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-wm7w-r6qf-3c9w disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-memory-leak-via-atomics-stor... disclosure@vulncheck.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 07:35 UTC · record ↗