CVE-2026-82820

A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amfstringnew of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: "While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities."

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82820.json",
    "cna_assigner": "VulDB",
    "cwe_ids": [
        "CWE-119",
        "CWE-122"
    ]
}

References

Affected packages

Git / github.com/noirotm/flvmeta

Affected ranges

Type

GIT

Repo

https://github.com/noirotm/flvmeta

Events

Introduced

39f1c840d24eab3e21e9415df421afbbf40f902c

Fixed

f412a33b9a84c2d1a9dee145a868feddbf64879e

Database specific

Show details

{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "1.2.0"
        },
        {
            "last_affected": "1.2.0"
        },
        {
            "introduced": "1.2.1"
        },
        {
            "last_affected": "1.2.1"
        },
        {
            "introduced": "1.2.2"
        },
        {
            "last_affected": "1.2.2"
        }
    ]
}

Affected versions

1.*

1.2.0

1.2.1

1.2.2

v1.*

v1.2.0

v1.2.1

v1.2.2

Database specific

vanir_signatures

[
    {
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "310514777420173794807366857929631032940",
                "244370841812237999735699935665842809825",
                "128732334420010214190282016849375588116",
                "101370302593737652182262194602810446547",
                "251009801443111364011588183501236655053",
                "130781754329986671525063898081549737686",
                "159293484608031558171543201754742373418",
                "43987466160122569819770566681973023583",
                "85992325812327259723141091534380562807",
                "73728616963582172539579608879150191070",
                "99299901983208145384755733197203590256",
                "165820954852985850711403580150185954695"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-82820-4aab8ce0",
        "target": {
            "file": "src/amf.c"
        },
        "source": "https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e",
        "signature_version": "v1"
    },
    {
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "297782582062901242244834457954230992243",
                "7936062967026794509415722111970322622",
                "122563071683213048106395023691305137802",
                "8087127419057187517553055646896399794"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-82820-54b8b3bf",
        "target": {
            "file": "src/amf.h"
        },
        "source": "https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e",
        "signature_version": "v1"
    },
    {
        "signature_type": "Function",
        "deprecated": false,
        "digest": {
            "length": 928.0,
            "function_hash": "264041650876922739760280910831815233974"
        },
        "id": "CVE-2026-82820-6ec970c0",
        "target": {
            "function": "amf_data_clone",
            "file": "src/amf.c"
        },
        "source": "https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e",
        "signature_version": "v1"
    },
    {
        "signature_type": "Function",
        "deprecated": false,
        "digest": {
            "length": 531.0,
            "function_hash": "281318379569081367423767149675183115732"
        },
        "id": "CVE-2026-82820-ae30346a",
        "target": {
            "function": "amf_string_new",
            "file": "src/amf.c"
        },
        "source": "https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e",
        "signature_version": "v1"
    }
]

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82820.json"

vanir_signatures_modified

"2026-09-03T08:04:45Z"