{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-21713",
        "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "state": "PUBLISHED",
        "assignerShortName": "hackerone",
        "dateReserved": "2026-01-04T15:00:06.574Z",
        "datePublished": "2026-03-30T19:07:28.356Z",
        "dateUpdated": "2026-05-10T13:17:50.281Z"
    },
    "containers": {
        "cna": {
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values.\r\n\r\nNode.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision.\r\n\r\nThis vulnerability affects **20.x, 22.x, 24.x, and 25.x**."
                }
            ],
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "vendor": "nodejs",
                    "product": "node",
                    "versions": [
                        {
                            "version": "20.20.1",
                            "status": "affected",
                            "lessThanOrEqual": "20.20.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "22.22.1",
                            "status": "affected",
                            "lessThanOrEqual": "22.22.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "24.14.0",
                            "status": "affected",
                            "lessThanOrEqual": "24.14.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "25.8.1",
                            "status": "affected",
                            "lessThanOrEqual": "25.8.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.0",
                            "status": "affected",
                            "lessThan": "4.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.0",
                            "status": "affected",
                            "lessThan": "5.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0",
                            "status": "affected",
                            "lessThan": "6.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "status": "affected",
                            "lessThan": "7.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.0",
                            "status": "affected",
                            "lessThan": "8.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "9.0",
                            "status": "affected",
                            "lessThan": "9.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "10.0",
                            "status": "affected",
                            "lessThan": "10.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "11.0",
                            "status": "affected",
                            "lessThan": "11.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "12.0",
                            "status": "affected",
                            "lessThan": "12.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "13.0",
                            "status": "affected",
                            "lessThan": "13.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "14.0",
                            "status": "affected",
                            "lessThan": "14.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "15.0",
                            "status": "affected",
                            "lessThan": "15.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "16.0",
                            "status": "affected",
                            "lessThan": "16.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "17.0",
                            "status": "affected",
                            "lessThan": "17.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "18.0",
                            "status": "affected",
                            "lessThan": "18.*",
                            "versionType": "semver"
                        },
                        {
                            "version": "19.0",
                            "status": "affected",
                            "lessThan": "19.*",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://nodejs.org/en/blog/vulnerability/march-2026-security-releases"
                }
            ],
            "metrics": [
                {
                    "cvssV3_0": {
                        "version": "3.0",
                        "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                        "baseScore": 5.9,
                        "baseSeverity": "MEDIUM"
                    }
                }
            ],
            "providerMetadata": {
                "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
                "shortName": "hackerone",
                "dateUpdated": "2026-03-30T19:07:28.356Z"
            }
        },
        "adp": [
            {
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "type": "CWE",
                                "cweId": "CWE-208",
                                "lang": "en",
                                "description": "CWE-208 Observable Timing Discrepancy"
                            }
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-30T19:45:13.027379Z",
                                "id": "CVE-2026-21713",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
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                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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}