CVE-2026-120439
QuickJS-NG before 0.16.0 Heap Buffer Overflow via TypedArray.prototype.sort
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| QuickJS-NG quickjs-ng quickjs-ng/quickjs
github |
≥ 0; < 0.16.0 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.3 high |
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 | CNA: VulnCheck |
| 3.1 / 7.0 high |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-9wv5-5cgr-grj6CNA: VulnCheck · vendor-advisory
- https://github.com/quickjs-ng/quickjs/commit/e93cca611908e12b824ec85fbee6b31a5ee61568CNA: VulnCheck · patch
- https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0CNA: VulnCheck · release-notes
- https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L60032CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-heap-buffer-overflow-via-typedarray-prototype-sortCNA: VulnCheck · third-party-advisory
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