CVE-2026-0821

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Source
https://cve.org/CVERecord?id=CVE-2026-0821
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-0821.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-0821
Downstream
Published
2026-01-10T13:02:07Z
Modified
2026-08-12T15:31:09Z
Severity
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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_typed_array_constructor heap-based overflow
Details

A vulnerability was determined in quickjs-ng quickjs up to 0.11.0. This vulnerability affects the function js_typed_array_constructor of the file quickjs.c. Executing a manipulation can lead to heap-based buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. This patch is called c5d80831e51e48a83eab16ea867be87f091783c5. A patch should be applied to remediate this issue.

Database specific 
{
    "cna_assigner": "VulDB",
    "cwe_ids": [
        "CWE-119",
        "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0821.json"
}
References

Affected packages

Git / github.com/quickjs-ng/quickjs

Affected ranges

Type
GIT
Repo
https://github.com/quickjs-ng/quickjs
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
c5d80831e51e48a83eab16ea867be87f091783c5
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:quickjs-ng:quickjs:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.11.0"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.1
0.10
0.11.0
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
v0.*
v0.1.0
v0.10.0
v0.10.1
v0.11.0
v0.2.0
v0.3.0
v0.4.0
v0.4.1
v0.5.0
v0.6.0
v0.6.1
v0.7.0
v0.8.0
v0.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-0821.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "156966015778241022997155822889589072122",
                "327637216839275509669170862799182210209",
                "20361890462439713804690032294639562237",
                "236119915891077895144408613444768543000"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-0821-748b75a9",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/quickjs-ng/quickjs/commit/c5d80831e51e48a83eab16ea867be87f091783c5",
        "target": {
            "file": "quickjs.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "284441466894633094989861512996126270919",
            "length": 1800
        },
        "id": "CVE-2026-0821-f21fd842",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/quickjs-ng/quickjs/commit/c5d80831e51e48a83eab16ea867be87f091783c5",
        "target": {
            "file": "quickjs.c",
            "function": "js_typed_array_constructor"
        }
    }
]
vanir_signatures_modified 
"2026-08-12T15:31:09Z"