High
undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client
Type: advisorySources: OSV
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. Patches Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-1528
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 03:46 UTC · Revision 1
Source evidence
undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client
core-osv · Original sourcePublished 12 Mar 2026, 20:21 UTC
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. Patches Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.
osv:CVE-2026-1528
Complete source record
{
"id": "fc106b14220c94339c633a38722122cc722e8ae41f77faae9aecfc6368104bde",
"url": "https://osv.dev/vulnerability/CVE-2026-1528",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client",
"summary": "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. Patches Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.",
"evidence": "osv:CVE-2026-1528",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-1528",
"aliases": [
"CVE-2026-1528",
"GHSA-f269-vfmq-vjvj"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/nodejs/undici",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "8873c947271faf1ebc455bdc6158ecbc022ecfa9"
},
{
"introduced": "1cfe0949053aac6267f11b919cee9315a27f1fd6"
},
{
"fixed": "07a39067a0485c1953196f500d945fe09378a176"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "6.24.0"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "7.0.0"
},
{
"fixed": "7.24.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1528.json"
}
}
],
"modified": "2026-10-28T02:30:42.311285835Z",
"provider": "osv",
"references": [
"https://github.com/nodejs/undici/",
"https://hackerone.com/reports/3537648",
"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1528.json",
"https://access.redhat.com/errata/RHSA-2026:13826",
"https://access.redhat.com/errata/RHSA-2026:17789",
"https://access.redhat.com/errata/RHSA-2026:21772",
"https://access.redhat.com/errata/RHSA-2026:21931",
"https://access.redhat.com/errata/RHSA-2026:34342",
"https://access.redhat.com/errata/RHSA-2026:5807",
"https://access.redhat.com/errata/RHSA-2026:7080",
"https://access.redhat.com/errata/RHSA-2026:7123",
"https://access.redhat.com/errata/RHSA-2026:7302",
"https://access.redhat.com/errata/RHSA-2026:7310",
"https://access.redhat.com/errata/RHSA-2026:7350",
"https://access.redhat.com/errata/RHSA-2026:7670",
"https://access.redhat.com/errata/RHSA-2026:7675",
"https://access.redhat.com/errata/RHSA-2026:7983",
"https://access.redhat.com/errata/RHSA-2026:9742",
"https://access.redhat.com/security/cve/CVE-2026-1528",
"https://cna.openjsf.org/security-advisories.html",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1528.json",
"https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj",
"https://nvd.nist.gov/vuln/detail/CVE-2026-1528",
"https://bugzilla.redhat.com/show_bug.cgi?id=2447145"
],
"provider_metadata": {
"cwe_ids": [
"CWE-1284",
"CWE-248"
],
"cna_assigner": "openjs",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": ">= 6.0.0 < 6.24.0; 7.0.0 < 7.24.0"
},
{
"last_affected": ">= 6.0.0 < 6.24.0; 7.0.0 < 7.24.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandaloneSingleVersion"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1528.json"
}
},
"related_cves": [
{
"value": "CVE-2026-1528",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 509947,
"published_at": "2026-03-12T20:21:57.775+00:00"
}