CVE-2026-120439

Description

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.

Overview

State: PUBLISHED
Assigner (CNA): VulnCheck
CVSS severity: HIGH
CVSS score: 8.3 / 10
CVSS vector: 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
Effective score: 8.3 / 10 HIGH source: CNA overview
CWE(s): CWE-190
Reserved: 2026-11-02
Published: 2026-11-02 14:29 UTC
Last updated: 2026-11-02 14:29 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/120xxx/CVE-2026-120439.json
Linked Threat: CVE-2026-120439 — QuickJS-NG before 0.16.0 Heap Buffer Overflow via TypedArray.prototype.sort

Affected products (1)

Vendor	Product	Versions	Platforms
quickjs-ng	QuickJS-NG	`0` (affected)	—

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

GitHub Security Advisory (GHSA-9wv5-5cgr-grj6) vendor-advisory
https://github.com/quickjs-ng/quickjs/commit/e93cca611908e12b824ec85fbee6b31a5ee61568 patch
QuickJS-NG v0.16.0 Release Notes release-notes
https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L60032 technical-description
VulnCheck Advisory: QuickJS-NG before 0.16.0 Heap Buffer Overflow via TypedArray.prototype.sort third-party-advisory

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-120439.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/quickjs-ng/quickjs",
          "product": "QuickJS-NG",
          "repo": "https://github.com/quickjs-ng/quickjs",
          "vendor": "quickjs-ng",
          "versions": [
            {
              "lessThan": "0.16.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:quickjs_project:quickjs:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "0.16.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Tristan Madani (Talence Security)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Sa\u00fal Ibarra Corretg\u00e9"
        }
      ],
      "datePublic": "2026-07-31T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
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          },
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            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H",
            "version": "3.1"
          },
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-190",
              "description": "Integer Overflow or Wraparound",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-02T14:29:01.345Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
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          "name": "GitHub Security Advisory (GHSA-9wv5-5cgr-grj6)",
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          ],
          "url": "https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-9wv5-5cgr-grj6"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/quickjs-ng/quickjs/commit/e93cca611908e12b824ec85fbee6b31a5ee61568"
        },
        {
          "name": "QuickJS-NG v0.16.0 Release Notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0"
        },
        {
          "tags": [
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          "url": "https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L60032"
        },
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          "tags": [
            "third-party-advisory"
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          "url": "https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-heap-buffer-overflow-via-typedarray-prototype-sort"
        }
      ],
      "title": "QuickJS-NG before 0.16.0 Heap Buffer Overflow via TypedArray.prototype.sort",
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  "cveMetadata": {
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    "datePublished": "2026-11-02T14:29:01.345Z",
    "dateReserved": "2026-11-02T12:42:15.449Z",
    "dateUpdated": "2026-11-02T14:29:01.345Z",
    "state": "PUBLISHED"
  },
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}