{ "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": "2026-07-15T01:21:34.462Z" }, "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": "
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.
Patches
Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.