{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-3706",
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "state": "PUBLISHED",
        "assignerShortName": "VulDB",
        "dateReserved": "2026-03-07T09:05:33.842Z",
        "datePublished": "2026-03-08T05:02:11.136Z",
        "dateUpdated": "2026-04-22T18:54:11.224Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
                "shortName": "VulDB",
                "dateUpdated": "2026-03-16T05:39:00.731Z"
            },
            "title": "mkj Dropbear S Range Check curve25519.c unpackneg signature verification",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "cweId": "CWE-347",
                            "lang": "en",
                            "description": "Improper Verification of Cryptographic Signature"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "cweId": "CWE-345",
                            "lang": "en",
                            "description": "Insufficient Verification of Data Authenticity"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "mkj",
                    "product": "Dropbear",
                    "versions": [
                        {
                            "version": "2025.0",
                            "status": "affected"
                        },
                        {
                            "version": "2025.1",
                            "status": "affected"
                        },
                        {
                            "version": "2025.2",
                            "status": "affected"
                        },
                        {
                            "version": "2025.3",
                            "status": "affected"
                        },
                        {
                            "version": "2025.4",
                            "status": "affected"
                        },
                        {
                            "version": "2025.5",
                            "status": "affected"
                        },
                        {
                            "version": "2025.6",
                            "status": "affected"
                        },
                        {
                            "version": "2025.7",
                            "status": "affected"
                        },
                        {
                            "version": "2025.8",
                            "status": "affected"
                        },
                        {
                            "version": "2025.9",
                            "status": "affected"
                        },
                        {
                            "version": "2025.10",
                            "status": "affected"
                        },
                        {
                            "version": "2025.11",
                            "status": "affected"
                        },
                        {
                            "version": "2025.12",
                            "status": "affected"
                        },
                        {
                            "version": "2025.13",
                            "status": "affected"
                        },
                        {
                            "version": "2025.14",
                            "status": "affected"
                        },
                        {
                            "version": "2025.15",
                            "status": "affected"
                        },
                        {
                            "version": "2025.16",
                            "status": "affected"
                        },
                        {
                            "version": "2025.17",
                            "status": "affected"
                        },
                        {
                            "version": "2025.18",
                            "status": "affected"
                        },
                        {
                            "version": "2025.19",
                            "status": "affected"
                        },
                        {
                            "version": "2025.20",
                            "status": "affected"
                        },
                        {
                            "version": "2025.21",
                            "status": "affected"
                        },
                        {
                            "version": "2025.22",
                            "status": "affected"
                        },
                        {
                            "version": "2025.23",
                            "status": "affected"
                        },
                        {
                            "version": "2025.24",
                            "status": "affected"
                        },
                        {
                            "version": "2025.25",
                            "status": "affected"
                        },
                        {
                            "version": "2025.26",
                            "status": "affected"
                        },
                        {
                            "version": "2025.27",
                            "status": "affected"
                        },
                        {
                            "version": "2025.28",
                            "status": "affected"
                        },
                        {
                            "version": "2025.29",
                            "status": "affected"
                        },
                        {
                            "version": "2025.30",
                            "status": "affected"
                        },
                        {
                            "version": "2025.31",
                            "status": "affected"
                        },
                        {
                            "version": "2025.32",
                            "status": "affected"
                        },
                        {
                            "version": "2025.33",
                            "status": "affected"
                        },
                        {
                            "version": "2025.34",
                            "status": "affected"
                        },
                        {
                            "version": "2025.35",
                            "status": "affected"
                        },
                        {
                            "version": "2025.36",
                            "status": "affected"
                        },
                        {
                            "version": "2025.37",
                            "status": "affected"
                        },
                        {
                            "version": "2025.38",
                            "status": "affected"
                        },
                        {
                            "version": "2025.39",
                            "status": "affected"
                        },
                        {
                            "version": "2025.40",
                            "status": "affected"
                        },
                        {
                            "version": "2025.41",
                            "status": "affected"
                        },
                        {
                            "version": "2025.42",
                            "status": "affected"
                        },
                        {
                            "version": "2025.43",
                            "status": "affected"
                        },
                        {
                            "version": "2025.44",
                            "status": "affected"
                        },
                        {
                            "version": "2025.45",
                            "status": "affected"
                        },
                        {
                            "version": "2025.46",
                            "status": "affected"
                        },
                        {
                            "version": "2025.47",
                            "status": "affected"
                        },
                        {
                            "version": "2025.48",
                            "status": "affected"
                        },
                        {
                            "version": "2025.49",
                            "status": "affected"
                        },
                        {
                            "version": "2025.50",
                            "status": "affected"
                        },
                        {
                            "version": "2025.51",
                            "status": "affected"
                        },
                        {
                            "version": "2025.52",
                            "status": "affected"
                        },
                        {
                            "version": "2025.53",
                            "status": "affected"
                        },
                        {
                            "version": "2025.54",
                            "status": "affected"
                        },
                        {
                            "version": "2025.55",
                            "status": "affected"
                        },
                        {
                            "version": "2025.56",
                            "status": "affected"
                        },
                        {
                            "version": "2025.57",
                            "status": "affected"
                        },
                        {
                            "version": "2025.58",
                            "status": "affected"
                        },
                        {
                            "version": "2025.59",
                            "status": "affected"
                        },
                        {
                            "version": "2025.60",
                            "status": "affected"
                        },
                        {
                            "version": "2025.61",
                            "status": "affected"
                        },
                        {
                            "version": "2025.62",
                            "status": "affected"
                        },
                        {
                            "version": "2025.63",
                            "status": "affected"
                        },
                        {
                            "version": "2025.64",
                            "status": "affected"
                        },
                        {
                            "version": "2025.65",
                            "status": "affected"
                        },
                        {
                            "version": "2025.66",
                            "status": "affected"
                        },
                        {
                            "version": "2025.67",
                            "status": "affected"
                        },
                        {
                            "version": "2025.68",
                            "status": "affected"
                        },
                        {
                            "version": "2025.69",
                            "status": "affected"
                        },
                        {
                            "version": "2025.70",
                            "status": "affected"
                        },
                        {
                            "version": "2025.71",
                            "status": "affected"
                        },
                        {
                            "version": "2025.72",
                            "status": "affected"
                        },
                        {
                            "version": "2025.73",
                            "status": "affected"
                        },
                        {
                            "version": "2025.74",
                            "status": "affected"
                        },
                        {
                            "version": "2025.75",
                            "status": "affected"
                        },
                        {
                            "version": "2025.76",
                            "status": "affected"
                        },
                        {
                            "version": "2025.77",
                            "status": "affected"
                        },
                        {
                            "version": "2025.78",
                            "status": "affected"
                        },
                        {
                            "version": "2025.79",
                            "status": "affected"
                        },
                        {
                            "version": "2025.80",
                            "status": "affected"
                        },
                        {
                            "version": "2025.81",
                            "status": "affected"
                        },
                        {
                            "version": "2025.82",
                            "status": "affected"
                        },
                        {
                            "version": "2025.83",
                            "status": "affected"
                        },
                        {
                            "version": "2025.84",
                            "status": "affected"
                        },
                        {
                            "version": "2025.85",
                            "status": "affected"
                        },
                        {
                            "version": "2025.86",
                            "status": "affected"
                        },
                        {
                            "version": "2025.87",
                            "status": "affected"
                        },
                        {
                            "version": "2025.88",
                            "status": "affected"
                        },
                        {
                            "version": "2025.89",
                            "status": "affected"
                        }
                    ],
                    "modules": [
                        "S Range Check"
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A vulnerability was determined in mkj Dropbear up to 2025.89. Impacted is the function unpackneg of the file src/curve25519.c of the component S Range Check. This manipulation causes improper verification of cryptographic signature. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitability is considered difficult. The actual existence of this vulnerability is currently in question. Patch name: fdec3c90a15447bd538641d85e5a3e3ac981011d. To fix this issue, it is recommended to deploy a patch. The project maintainer explains: \"Signature Malleability is not exploitable in SSH protocol. (...) [A] PoC doesn't exist for SSH implementation, but rather it's against the internal API.\""
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "version": "4.0",
                        "baseScore": 6.3,
                        "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U",
                        "baseSeverity": "MEDIUM"
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            "timeline": [
                {
                    "time": "2026-03-07T00:00:00.000Z",
                    "lang": "en",
                    "value": "Advisory disclosed"
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                {
                    "time": "2026-03-07T01:00:00.000Z",
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                    "time": "2026-03-16T06:42:50.000Z",
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            ],
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                    "value": "pythok (VulDB User)",
                    "type": "reporter"
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            ],
            "references": [
                {
                    "url": "https://vuldb.com/?id.349652",
                    "name": "VDB-349652 | mkj Dropbear S Range Check curve25519.c unpackneg signature verification",
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                },
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                    "tags": [
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                },
                {
                    "url": "https://vuldb.com/?submit.765933",
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                    "tags": [
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                },
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                    "url": "https://github.com/mkj/dropbear/issues/406",
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                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-10T14:05:08.951683Z",
                                "id": "CVE-2026-3706",
                                "options": [
                                    {
                                        "Exploitation": "poc"
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                                        "Technical Impact": "partial"
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}