UBUNTU-CVE-2026-83599 (CVE-2026-83599)
Vulnerability from osv_ubuntu – Published: 2026-09-22 17:17 – Updated: 2026-09-22 17:17 – Source website
VLAI
Details
Netdata is an open source observability tool. Prior to 2.11.0, Netdata's unauthenticated WebSocket server negotiates permessage-deflate before authentication, and src/web/websocket/websocket-compression.c allows websocket_client_decompress_message() to grow decompressed output toward WS_MAX_DECOMPRESSED_SIZE without enforcing a compressed-to-decompressed ratio. Small highly compressed frames can therefore cause large server-side allocations, and repeated concurrent connections can exhaust memory and terminate monitoring. This vulnerability is fixed in 2.11.0.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "netdata",
"binary_version": "1.9.0+dfsg-1ubuntu0.1~esm1"
},
{
"binary_name": "netdata-data",
"binary_version": "1.9.0+dfsg-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "netdata",
"purl": "pkg:deb/ubuntu/netdata@1.9.0+dfsg-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.7.0+dfsg-1",
"1.8.0+dfsg-1",
"1.9.0+dfsg-1",
"1.9.0+dfsg-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "netdata",
"binary_version": "1.19.0-3ubuntu1+esm1"
},
{
"binary_name": "netdata-apache2",
"binary_version": "1.19.0-3ubuntu1+esm1"
},
{
"binary_name": "netdata-core",
"binary_version": "1.19.0-3ubuntu1+esm1"
},
{
"binary_name": "netdata-plugins-bash",
"binary_version": "1.19.0-3ubuntu1+esm1"
},
{
"binary_name": "netdata-plugins-nodejs",
"binary_version": "1.19.0-3ubuntu1+esm1"
},
{
"binary_name": "netdata-plugins-python",
"binary_version": "1.19.0-3ubuntu1+esm1"
},
{
"binary_name": "netdata-web",
"binary_version": "1.19.0-3ubuntu1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "netdata",
"purl": "pkg:deb/ubuntu/netdata@1.19.0-3ubuntu1+esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.16.1-2",
"1.19.0-3ubuntu1",
"1.19.0-3ubuntu1+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "netdata",
"binary_version": "1.33.1-1ubuntu1+esm1"
},
{
"binary_name": "netdata-apache2",
"binary_version": "1.33.1-1ubuntu1+esm1"
},
{
"binary_name": "netdata-core",
"binary_version": "1.33.1-1ubuntu1+esm1"
},
{
"binary_name": "netdata-plugins-bash",
"binary_version": "1.33.1-1ubuntu1+esm1"
},
{
"binary_name": "netdata-plugins-nodejs",
"binary_version": "1.33.1-1ubuntu1+esm1"
},
{
"binary_name": "netdata-plugins-python",
"binary_version": "1.33.1-1ubuntu1+esm1"
},
{
"binary_name": "netdata-web",
"binary_version": "1.33.1-1ubuntu1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "netdata",
"purl": "pkg:deb/ubuntu/netdata@1.33.1-1ubuntu1+esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.29.3-4",
"1.31.0-4",
"1.33.1-1ubuntu1",
"1.33.1-1ubuntu1+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "netdata",
"binary_version": "1.43.2-1build2"
},
{
"binary_name": "netdata-apache2",
"binary_version": "1.43.2-1build2"
},
{
"binary_name": "netdata-core",
"binary_version": "1.43.2-1build2"
},
{
"binary_name": "netdata-plugins-bash",
"binary_version": "1.43.2-1build2"
},
{
"binary_name": "netdata-plugins-python",
"binary_version": "1.43.2-1build2"
},
{
"binary_name": "netdata-web",
"binary_version": "1.43.2-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "netdata",
"purl": "pkg:deb/ubuntu/netdata@1.43.2-1build2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.42.1-1",
"1.43.1-1",
"1.43.2-1",
"1.43.2-1build1",
"1.43.2-1build2"
]
}
],
"aliases": [],
"details": "Netdata is an open source observability tool. Prior to 2.11.0, Netdata\u0027s unauthenticated WebSocket server negotiates permessage-deflate before authentication, and src/web/websocket/websocket-compression.c allows websocket_client_decompress_message() to grow decompressed output toward WS_MAX_DECOMPRESSED_SIZE without enforcing a compressed-to-decompressed ratio. Small highly compressed frames can therefore cause large server-side allocations, and repeated concurrent connections can exhaust memory and terminate monitoring. This vulnerability is fixed in 2.11.0.",
"id": "UBUNTU-CVE-2026-83599",
"modified": "2026-09-22T17:17:00Z",
"published": "2026-09-22T17:17:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-83599"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-83599"
},
{
"type": "REPORT",
"url": "https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7"
},
{
"type": "REPORT",
"url": "https://github.com/netdata/netdata/pull/22828"
},
{
"type": "REPORT",
"url": "https://github.com/netdata/netdata/releases/tag/v2.11.0"
},
{
"type": "REPORT",
"url": "https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-83599"
]
}
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Sightings
| Author | Source | Type | Date | Other |
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Nomenclature
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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