{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-1528", "assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb", "state": "PUBLISHED", "assignerShortName": "openjs", "dateReserved": "2026-01-28T12:05:10.024Z", "datePublished": "2026-03-12T20:21:57.775Z", "dateUpdated": "2026-03-12T20:21:57.775Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ce714d77-add3-4f53-aff5-83d477b104bb", "shortName": "openjs", "dateUpdated": "2026-03-12T20:21:57.775Z"}, "title": "undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-248", "description": "CWE-248 Uncaught exception", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-1284", "description": "CWE-1284 Improper validation of specified quantity in input", "type": "CWE"}]}], "affected": [{"vendor": "undici", "product": "undici", "collectionURL": "https://github.com/nodejs/undici/", "packageName": "undici", "repo": "https://github.com/nodejs/undici/", "versions": [{"status": "affected", "version": ">= 6.0.0 < 6.24.0; 7.0.0 < 7.24.0"}, {"status": "unaffected", "version": "6.24.0: 7.24.0"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.\n\nPatches\n\nPatched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<h3><span>Impact</span></h3><p>A server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.<br><br><b>Patches<br></b><br>Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.<br></p><br>"}]}], "references": [{"url": "https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj"}, {"url": "https://hackerone.com/reports/3537648"}, {"url": "https://cna.openjsf.org/security-advisories.html"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}}], "credits": [{"lang": "en", "value": "Matteo Collina", "type": "remediation reviewer"}, {"lang": "en", "value": "Ulises Gasc\u00f3n", "type": "remediation developer"}], "source": {"advisory": "GHSA-f269-vfmq-vjvj", "discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.0"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.\n\nPatches\n\nPatched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later."}], "id": "CVE-2026-1528", "lastModified": "2026-03-12T21:16:25.330", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "ce714d77-add3-4f53-aff5-83d477b104bb", "type": "Secondary"}]}, "published": "2026-03-12T21:16:25.330", "references": [{"source": "ce714d77-add3-4f53-aff5-83d477b104bb", "url": "https://cna.openjsf.org/security-advisories.html"}, {"source": "ce714d77-add3-4f53-aff5-83d477b104bb", "url": "https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj"}, {"source": "ce714d77-add3-4f53-aff5-83d477b104bb", "url": "https://hackerone.com/reports/3537648"}], "sourceIdentifier": "ce714d77-add3-4f53-aff5-83d477b104bb", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-248"}, {"lang": "en", "value": "CWE-1284"}], "source": "ce714d77-add3-4f53-aff5-83d477b104bb", "type": "Secondary"}]}

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