Medium severity5.3NVD Advisory· Published Nov 2, 2026
CVE-2026-120440
CVE-2026-120440
Description
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.
Affected products
1- Range: <0.16.0
Patches
Vulnerability mechanics
References
5- github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.cnvd
- github.com/quickjs-ng/quickjs/commit/62951e1bc68711d37aad986ff84ef0fe17038a7envd
- github.com/quickjs-ng/quickjs/releases/tag/v0.16.0nvd
- github.com/quickjs-ng/quickjs/security/advisories/GHSA-wm7w-r6qf-3c9wnvd
- www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-memory-leak-via-atomics-storenvd
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