Medium
Security advisory
In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the WebSocket HTTP upgrade implementation buffers the full http request before doing the handshake, holding the entire request body in memory. There should be a reasonnable limit (8192 bytes) above which the WebSocket gets an HTTP response with the 413 status code and the connection gets closed.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-12541
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:35 UTC · Revision 1
Source evidence
In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the WebSocket HTTP upgrade implementation buffers the full http request before doing the handshake, holding the entire request body in memory. There should be a reasonnable limit (8192 bytes) above which the WebSocket gets an HTTP response with the 413 status code and the connection gets closed.
osv:CVE-2018-12541
Complete source record
{
"id": "826821823441feaf908f2bd40a99d28839cebfffc0f8efe2cdcc906825f8f9d2",
"url": "https://osv.dev/vulnerability/CVE-2018-12541",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-12541",
"summary": "In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the WebSocket HTTP upgrade implementation buffers the full http request before doing the handshake, holding the entire request body in memory. There should be a reasonnable limit (8192 bytes) above which the WebSocket gets an HTTP response with the 413 status code and the connection gets closed.",
"evidence": "osv:CVE-2018-12541",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2018-12541",
"aliases": [
"CVE-2018-12541",
"GHSA-45xm-v8gq-7jqx"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/eclipse-vertx/vert.x",
"type": "GIT",
"events": [
{
"introduced": "187083cc2572afe82b5bf9c743fa4df868926a56"
},
{
"fixed": "771b499b0f1fa94e648d895f042643ba2fe74c03"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.5.4"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"3.5.3",
"3.5.3.CR1",
"3.5.2",
"3.5.2.CR3",
"3.5.2.CR2",
"3.5.2.CR1",
"3.5.1",
"3.5.0",
"3.5.0.Beta1",
"3.4.2",
"3.4.1",
"3.4.0",
"3.4.0.Beta1",
"3.3.3",
"3.3.2",
"3.3.1",
"3.3.0",
"3.3.0.CR2",
"3.2.1",
"3.2.0",
"3.1.0",
"3.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12541.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/vert-x3/vertx-web",
"type": "GIT",
"events": [
{
"introduced": "d2c694c1936370c12f14b80b4a3591e43914844d"
},
{
"fixed": "7f9acbb0544fc890e3618c93f2dd6a83eb19942a"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.5.4"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"3.5.3",
"3.5.3.CR1",
"3.5.2",
"3.5.2.CR3",
"3.5.2.CR2",
"3.5.2.CR1",
"3.5.1",
"3.5.0",
"3.4.2",
"3.4.1",
"3.4.0",
"3.4.0.Beta1",
"3.3.3",
"3.3.2",
"3.3.1",
"3.3.0",
"3.3.0.CR2",
"3.2.1",
"3.2.0",
"3.1.0",
"3.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12541.json"
}
}
],
"modified": "2026-10-24T10:47:39.437597680Z",
"provider": "osv",
"references": [
"https://lists.apache.org/thread.html/r01123837ffbfdf5809e0a4ac354ad546e4ca8f18df89ee5a10eeb81b%40%3Cissues.bookkeeper.apache.org%3E",
"https://lists.apache.org/thread.html/r11789cd6d67ecca2d6f6bbb11e34495e68ee99287b6c59edf5b1a09c%40%3Ccommits.pulsar.apache.org%3E",
"https://lists.apache.org/thread.html/r1af71105539fe01fcecb92d2ecd8eea56c515fb1c80ecab4df424553%40%3Cissues.bookkeeper.apache.org%3E",
"https://lists.apache.org/thread.html/r344235b1aea2f7fa2381495df1d77d02b595e3d7e4626e701f7c1062%40%3Ccommits.pulsar.apache.org%3E",
"https://lists.apache.org/thread.html/r362835e6c7f34324ed24e318b363fcdd20cea91d0cea0b2e1164f73e%40%3Cissues.bookkeeper.apache.org%3E",
"https://lists.apache.org/thread.html/r3da899890536af744dec897fbc561fd9810ac45e79a16164b53c31b2%40%3Ccommits.pulsar.apache.org%3E",
"https://lists.apache.org/thread.html/r79789a0afb184abd13a2c07016e6e7ab8e64331f332b630bf82a2eed%40%3Ccommits.pulsar.apache.org%3E",
"https://lists.apache.org/thread.html/r8db0431ecf93f2dd2128db5ddca897b33ba883b7f126648d6a9e4c47%40%3Ccommits.pulsar.apache.org%3E",
"https://lists.apache.org/thread.html/r98dc06e2b1c498d0e9eb5038d8e1aefd24e411e50522e7082dd9e0b7%40%3Ccommits.bookkeeper.apache.org%3E",
"https://lists.apache.org/thread.html/rbdc279ecdb7ac496a03befb05a53605c4ce2b67e14f8f4df4cfa1203%40%3Cissues.bookkeeper.apache.org%3E",
"https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E",
"https://lists.apache.org/thread.html/re5ddabee26fbcadc7254d03a5a073d64080a9389adc9e452529664ed%40%3Ccommits.pulsar.apache.org%3E",
"https://lists.apache.org/thread.html/reb3cc4f3e10264896a541813c0030ec9d9466ba9b722fe5d4adc91cd%40%3Cissues.bookkeeper.apache.org%3E",
"https://access.redhat.com/errata/RHSA-2018:2946",
"https://bugs.eclipse.org/bugs/show_bug.cgi?id=539170",
"https://github.com/eclipse-vertx/vert.x/issues/2648"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*"
],
"vendor_product": "eclipse:vert.x",
"extracted_events": [
{
"range": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.5.4"
}
],
"source": "CPE_RANGE"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-12541",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 441437,
"published_at": "2018-10-10T20:29:00.38+00:00"
}