CVE-2026-120440 — Vulnerability intelligence
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Published:
- CVSS
- 6.9
- CISA KEV
- Not listed; not proof of no exploitation
Original source text (not a translation)
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.