High
Denial of service when handling a request with many HTTP headers in ws
Type: advisorySources: OSV
ws is an open source WebSocket client and server for Node.js. A request with a number of headers exceeding theserver.maxHeadersCount threshold could be used to crash a ws server. The vulnerability was fixed in ws@8.17.1 (e55e510) and backported to ws@7.5.10 (22c2876), ws@6.2.3 (eeb76d3), and ws@5.2.4 (4abd8f6). In vulnerable versions of ws, the issue can be mitigated in the following ways: 1. Reduce the maximum allowed length of the request headers using the --max-http-header-size=size and/or the maxHeaderSize options so that no more headers than the server.maxHeadersCount limit can be sent. 2. Set server.maxHeadersCount to 0 so that no limit is applied.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2024-37890
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 23:45 UTC · Revision 1
Source evidence
Denial of service when handling a request with many HTTP headers in ws
core-osv · Original sourcePublished 17 Jun 2024, 19:09 UTC
ws is an open source WebSocket client and server for Node.js. A request with a number of headers exceeding theserver.maxHeadersCount threshold could be used to crash a ws server. The vulnerability was fixed in ws@8.17.1 (e55e510) and backported to ws@7.5.10 (22c2876), ws@6.2.3 (eeb76d3), and ws@5.2.4 (4abd8f6). In vulnerable versions of ws, the issue can be mitigated in the following ways: 1. Reduce the maximum allowed length of the request headers using the --max-http-header-size=size and/or the maxHeaderSize options so that no more headers than the server.maxHeadersCount limit can be sent. 2. Set server.maxHeadersCount to 0 so that no limit is applied.
osv:CVE-2024-37890
Complete source record
{
"id": "130533442497c08d42a3f3180a434d27e3a1fbeec61d76bc3a5b633f24eea6f5",
"url": "https://osv.dev/vulnerability/CVE-2024-37890",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Denial of service when handling a request with many HTTP headers in ws",
"summary": "ws is an open source WebSocket client and server for Node.js. A request with a number of headers exceeding theserver.maxHeadersCount threshold could be used to crash a ws server. The vulnerability was fixed in ws@8.17.1 (e55e510) and backported to ws@7.5.10 (22c2876), ws@6.2.3 (eeb76d3), and ws@5.2.4 (4abd8f6). In vulnerable versions of ws, the issue can be mitigated in the following ways: 1. Reduce the maximum allowed length of the request headers using the --max-http-header-size=size and/or the maxHeaderSize options so that no more headers than the server.maxHeadersCount limit can be sent. 2. Set server.maxHeadersCount to 0 so that no limit is applied.",
"evidence": "osv:CVE-2024-37890",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2024-37890",
"aliases": [
"CVE-2024-37890",
"GHSA-3h5v-q93c-6h6q"
],
"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/websockets/ws",
"type": "GIT",
"events": [
{
"introduced": "5bccfe59252923b85e7cffd56e3ddc1bd742f378"
},
{
"fixed": "aa8fe0a93f65a5aad9e9724d14c09950682c46c4"
},
{
"introduced": "1ee42fd67d365409096c11af0d6bc70fbe292c60"
},
{
"fixed": "d87f3b6d3a00513af9bbb74f45ba9183af4e5f43"
},
{
"introduced": "092a822a41eb22f6d6745c18bc29b9c40715680f"
},
{
"fixed": "d962d70649e393841ee1ed726a8f7ffbe90d0c06"
},
{
"introduced": "fc4024898c0da9b587c50a4a2d02d3ff88cddf06"
},
{
"fixed": "3c56601092872f7d7566989f0e379271afd0e4a1"
},
{
"fixed": "22c28763234aa75a7e1b76f5c01c181260d7917f"
},
{
"fixed": "4abd8f6de4b0b65ef80b3ff081989479ed93377e"
},
{
"fixed": "e55e5106f10fcbaac37cfa89759e4cc0d073a52c"
},
{
"fixed": "eeb76d313e2a00dd5247ca3597bba7877d064a63"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "2.1.0"
},
{
"fixed": "5.2.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "6.0.0"
},
{
"fixed": "6.2.3"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "7.0.0"
},
{
"fixed": "7.5.10"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.17.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "22c28763234aa75a7e1b76f5c01c181260d7917f"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "4abd8f6de4b0b65ef80b3ff081989479ed93377e"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "e55e5106f10fcbaac37cfa89759e4cc0d073a52c"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "eeb76d313e2a00dd5247ca3597bba7877d064a63"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"6.2.2",
"7.5.9",
"8.17.0",
"8.16.0",
"8.15.1",
"8.15.0",
"8.14.2",
"8.14.1",
"8.14.0",
"8.13.0",
"8.12.1",
"8.12.0",
"8.11.0",
"8.10.0",
"8.9.0",
"8.8.1",
"7.5.8",
"8.8.0",
"8.7.0",
"7.5.7",
"8.6.0",
"8.5.0",
"7.5.6",
"8.4.2",
"8.4.1",
"8.4.0",
"8.3.0",
"7.5.5",
"8.2.3",
"8.2.2",
"7.5.4",
"8.2.1",
"7.5.3",
"8.2.0",
"8.1.0",
"8.0.0",
"7.5.2",
"7.5.1",
"7.5.0",
"5.2.3",
"5.2.2",
"6.2.1",
"7.4.6",
"7.4.5",
"7.4.4",
"7.4.3",
"7.4.2",
"7.4.1",
"7.4.0",
"7.3.1",
"7.3.0",
"7.2.5",
"7.2.4",
"7.2.3",
"7.2.2",
"7.2.1",
"7.2.0",
"7.1.2",
"7.1.1",
"7.1.0",
"7.0.1",
"7.0.0",
"6.2.0",
"6.1.4",
"6.1.3",
"6.1.2",
"6.1.1",
"6.1.0",
"6.0.0",
"5.2.1",
"5.2.0",
"5.1.1",
"5.1.0",
"5.0.0",
"4.1.0",
"4.0.0",
"3.3.3",
"3.3.2",
"3.3.1",
"3.3.0",
"3.2.0",
"3.1.0",
"3.0.0",
"2.3.1",
"2.3.0",
"2.2.3",
"2.2.2",
"2.2.1",
"2.2.0",
"2.1.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-37890.json"
}
}
],
"modified": "2026-10-28T02:30:24.547506705Z",
"provider": "osv",
"references": [
"https://nodejs.org/api/http.html#servermaxheaderscount",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/37xxx/CVE-2024-37890.json",
"https://github.com/websockets/ws/security/advisories/GHSA-3h5v-q93c-6h6q",
"https://nvd.nist.gov/vuln/detail/CVE-2024-37890",
"https://github.com/websockets/ws/issues/2230",
"https://github.com/websockets/ws/commit/22c28763234aa75a7e1b76f5c01c181260d7917f",
"https://github.com/websockets/ws/commit/4abd8f6de4b0b65ef80b3ff081989479ed93377e",
"https://github.com/websockets/ws/commit/e55e5106f10fcbaac37cfa89759e4cc0d073a52c",
"https://github.com/websockets/ws/commit/eeb76d313e2a00dd5247ca3597bba7877d064a63",
"https://github.com/websockets/ws/pull/2231"
],
"provider_metadata": {
"cwe_ids": [
"CWE-476"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/37xxx/CVE-2024-37890.json"
}
},
"related_cves": [
{
"value": "CVE-2024-37890",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 490961,
"published_at": "2024-06-17T19:09:02.127+00:00"
}