CVE-2026-120439

    Dashboard / Vulnerabilities / CVE-2026-120439

    CVE-2026-120439

    Published: 2 Nov 2026Last Modified: 8 Nov 2026

    Summary: QuickJS-NG before 0.16.0 Heap Buffer Overflow via TypedArray.prototype.sort

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120439.json, https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0, https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-9wv5-5cgr-grj6, https://nvd.nist.gov/vuln/detail/CVE-2026-120439, https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-heap-buffer-overflow-via-typedarray-prototype-sort, https://github.com/quickjs-ng/quickjs/commit/e93cca611908e12b824ec85fbee6b31a5ee61568, https://github.com/quickjs-ng/quickjs, https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L60032

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -10b99693cdc3f37cdf05114bc2d5225de495c4a3

    Affected versions

    v0.15.1
    v0.15.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-120439 | CVE-DB