{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-55131", "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "state": "PUBLISHED", "assignerShortName": "hackerone", "dateReserved": "2025-08-07T15:00:05.576Z", "datePublished": "2026-01-20T20:41:55.591Z", "dateUpdated": "2026-01-20T20:41:55.591Z"}, "containers": {"cna": {"descriptions": [{"lang": "en", "value": "A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the `vm` module with the timeout option. Under specific timing conditions, buffers allocated with `Buffer.alloc` and other `TypedArray` instances like `Uint8Array` may contain leftover data from previous operations, allowing in-process secrets like tokens or passwords to leak or causing data corruption. While exploitation typically requires precise timing or in-process code execution, it can become remotely exploitable when untrusted input influences workload and timeouts, leading to potential confidentiality and integrity impact."}], "affected": [{"defaultStatus": "unaffected", "vendor": "nodejs", "product": "node", "versions": [{"version": "20.19.6", "status": "affected", "lessThanOrEqual": "20.19.6", "versionType": "semver"}, {"version": "22.21.1", "status": "affected", "lessThanOrEqual": "22.21.1", "versionType": "semver"}, {"version": "24.12.0", "status": "affected", "lessThanOrEqual": "24.12.0", "versionType": "semver"}, {"version": "25.2.1", "status": "affected", "lessThanOrEqual": "25.2.1", "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"}]}], "references": [{"url": "https://nodejs.org/en/blog/vulnerability/december-2025-security-releases"}], "metrics": [{"cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L", "baseScore": 7.1, "baseSeverity": "HIGH"}}], "providerMetadata": {"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "shortName": "hackerone", "dateUpdated": "2026-01-20T20:41:55.591Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the `vm` module with the timeout option. Under specific timing conditions, buffers allocated with `Buffer.alloc` and other `TypedArray` instances like `Uint8Array` may contain leftover data from previous operations, allowing in-process secrets like tokens or passwords to leak or causing data corruption. While exploitation typically requires precise timing or in-process code execution, it can become remotely exploitable when untrusted input influences workload and timeouts, leading to potential confidentiality and integrity impact."}], "id": "CVE-2025-55131", "lastModified": "2026-01-20T21:16:03.320", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L", "version": "3.0"}, "exploitabilityScore": 1.6, "impactScore": 5.5, "source": "support@hackerone.com", "type": "Secondary"}]}, "published": "2026-01-20T21:16:03.320", "references": [{"source": "support@hackerone.com", "url": "https://nodejs.org/en/blog/vulnerability/december-2025-security-releases"}], "sourceIdentifier": "support@hackerone.com", "vulnStatus": "Received"}

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