CVE-2026-3979

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Source
https://cve.org/CVERecord?id=CVE-2026-3979
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3979.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-3979
Downstream
Published
2026-03-12T03:32:14.860Z
Modified
2026-08-12T16:23:57.514808Z
Severity
  • 1.9 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free
Details

A flaw has been found in quickjs-ng quickjs up to 0.12.1. This affects the function jsiteratorconcat_return of the file quickjs.c. This manipulation causes use after free. The attack requires local access. The exploit has been published and may be used. Patch name: daab4ad4bae4ef071ed0294618d6244e92def4cd. Applying a patch is the recommended action to fix this issue.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3979.json",
    "cna_assigner": "VulDB",
    "cwe_ids": [
        "CWE-119",
        "CWE-416"
    ]
}
References

Affected packages

Git / github.com/quickjs-ng/quickjs

Affected ranges

Type
GIT
Repo
https://github.com/quickjs-ng/quickjs
Events
Introduced
db870fd4619bf8c659cf85dd092101ea2a1a8a07
Fixed
daab4ad4bae4ef071ed0294618d6244e92def4cd
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0.12.0"
        },
        {
            "last_affected": "0.12.0"
        },
        {
            "introduced": "0.12.1"
        },
        {
            "last_affected": "0.12.1"
        }
    ]
}

Affected versions

0.*
0.12.0
0.12.1
v0.*
v0.12.0
v0.12.1

Database specific

vanir_signatures_modified 
"2026-08-12T16:23:57Z"
vanir_signatures 
[
    {
        "digest": {
            "function_hash": "230536989381960940336023691743095805747",
            "length": 786.0
        },
        "signature_type": "Function",
        "source": "https://github.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cd",
        "id": "CVE-2026-3979-1854d883",
        "deprecated": false,
        "signature_version": "v1",
        "target": {
            "file": "quickjs.c",
            "function": "js_iterator_concat_return"
        }
    },
    {
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "301286445733633105478528541740594711863",
                "85104619995533220958437685240232835921",
                "221517156546039221881911438746365139834",
                "118199334696509644070484373721389146586",
                "228899262248462652499761738676445631239",
                "50944739852877348565986046444610209575",
                "96892545259203819775449922083888496111",
                "314240493682393923678887479567467512933",
                "214653219760447087888356191352120869268"
            ]
        },
        "signature_type": "Line",
        "source": "https://github.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cd",
        "id": "CVE-2026-3979-a7b8e35f",
        "deprecated": false,
        "signature_version": "v1",
        "target": {
            "file": "quickjs.c"
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3979.json"