[ CVE-2026-120440 · Published 2 Nov 2026 ]
Vulnerability in QuickJS-NG
CVSS 5.3
EPSS <1%No fix listed yet
[ Description ]Official 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.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ References ]References
- github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c
- github.com/quickjs-ng/quickjs/commit/62951e1bc68711d37aad986ff84ef0fe17038a7e
- github.com/quickjs-ng/quickjs/releases/tag/v0.16.0
- github.com/quickjs-ng/quickjs/security/advisories/GHSA-wm7w-r6qf-3c9w
- www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-memory-leak-via-atomics-store