Vulnerability-Lookup

GHSA-48FX-7FJQ-QGG4

Vulnerability from github – Published: 2026-11-02 15:31 – Updated: 2026-11-02 15:31

Details

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.

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

6.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-120440"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-11-02T15:17:26Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-48fx-7fjq-qgg4",
  "modified": "2026-11-02T15:31:41Z",
  "published": "2026-11-02T15:31:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-wm7w-r6qf-3c9w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120440"
    },
    {
      "type": "WEB",
      "url": "https://github.com/quickjs-ng/quickjs/commit/62951e1bc68711d37aad986ff84ef0fe17038a7e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L61154"
    },
    {
      "type": "WEB",
      "url": "https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-memory-leak-via-atomics-store"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-120440 (GCVE-0-2026-120440)

Vulnerability from cvelistv5 – Published: 2026-11-02 14:29 – Updated: 2026-11-02 17:33

Title

QuickJS-NG before 0.16.0 Memory Leak via Atomics.store

Summary

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-02 17:12 UTC

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 7402 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/quickjs-ng/quickjs/security/ad…	vendor-advisory
https://github.com/quickjs-ng/quickjs/commit/6295…	patch
https://github.com/quickjs-ng/quickjs/releases/ta…	release-notes
https://github.com/quickjs-ng/quickjs/blob/v0.15.…	technical-description
https://www.vulncheck.com/advisories/quickjs-ng-b…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
quickjs-ng	QuickJS-NG	Affected: 0 , < 0.16.0 (semver) cpe:2.3:a:quickjs_project:quickjs::::::::

Date Public

2026-07-31 00:00

Credits

Tristan Madani (Talence Security) Saúl Ibarra Corretgé

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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