CVE-2026-120439: high-severity vulnerability in QuickJS-NG
QuickJS-NG before 0.16.0 Heap Buffer Overflow via TypedArray.prototype.sort
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.3epss 0.3%
QuickJS-NG before 0.16.0 contains an integer overflow in js_typed_array_sort() in quickjs.c that allows attackers to cause a heap buffer overflow on 32-bit hosts. Attackers who can run JavaScript can call TypedArray.prototype.sort with a comparator on a typed array near 2^30 elements, wrapping the allocation size and writing indices past the buffer to crash or potentially execute code.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Affected products
quickjs-ng · QuickJS-NGRelated CVEs — QuickJS-NG
In the same product, most dangerous first.
References
https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L60032https://github.com/quickjs-ng/quickjs/commit/e93cca611908e12b824ec85fbee6b31a5ee61568https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-9wv5-5cgr-grj6https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-heap-buffer-overflow-via-typedarray-prototype-sort