ubuntu-cve-2026-62389
Vulnerability from osv_ubuntu
Published
2026-07-15 18:16
Modified
2026-07-22 06:01
Summary
Details
ws before 8.21.1 contains a memory exhaustion vulnerability in lib/receiver.js where the fragment guard only triggers when fragment count reaches maxFragments, allowing attackers to exhaust memory by sending incomplete fragmented WebSocket messages. Attackers can send a text frame with FIN=0 followed by continuation frames without completing the sequence, causing each fragment to be stored as a separate Buffer object with significant overhead, enabling denial of service through heap exhaustion.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ws",
"binary_version": "1.0.1+ds1.e6ddaae4-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "node-ws",
"purl": "pkg:deb/ubuntu/node-ws@1.0.1+ds1.e6ddaae4-1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.7.2+ds1.349b7460-1",
"1.0.1+ds1.e6ddaae4-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ws",
"binary_version": "1.1.0+ds1.e6ddaae4-3ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "node-ws",
"purl": "pkg:deb/ubuntu/node-ws@1.1.0+ds1.e6ddaae4-3ubuntu1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.1.0+ds1.e6ddaae4-3build1",
"1.1.0+ds1.e6ddaae4-3ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ws",
"binary_version": "7.2.1-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "node-ws",
"purl": "pkg:deb/ubuntu/node-ws@7.2.1-3?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.1.0+ds1.e6ddaae4-5",
"7.2.1-2",
"7.2.1-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ws",
"binary_version": "8.5.0+~cs13.3.3-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "node-ws",
"purl": "pkg:deb/ubuntu/node-ws@8.5.0+~cs13.3.3-2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"7.4.2+~cs18.0.8-2",
"7.5.5+~cs13.0.13-1",
"8.5.0+~cs13.3.3-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ws",
"binary_version": "8.11.0+~cs13.7.3-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "node-ws",
"purl": "pkg:deb/ubuntu/node-ws@8.11.0+~cs13.7.3-2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.11.0+~cs13.7.3-1",
"8.11.0+~cs13.7.3-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "node-ws",
"binary_version": "8.19.0+~cs14.19.1-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "node-ws",
"purl": "pkg:deb/ubuntu/node-ws@8.19.0+~cs14.19.1-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.18.1+~cs14.18.2-1",
"8.19.0+~cs14.19.1-1"
]
}
],
"aliases": [],
"details": "ws before 8.21.1 contains a memory exhaustion vulnerability in lib/receiver.js where the fragment guard only triggers when fragment count reaches maxFragments, allowing attackers to exhaust memory by sending incomplete fragmented WebSocket messages. Attackers can send a text frame with FIN=0 followed by continuation frames without completing the sequence, causing each fragment to be stored as a separate Buffer object with significant overhead, enabling denial of service through heap exhaustion.",
"id": "UBUNTU-CVE-2026-62389",
"modified": "2026-07-22T06:01:46Z",
"published": "2026-07-15T18:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-62389"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-62389"
},
{
"type": "REPORT",
"url": "https://github.com/websockets/ws/issues/2331"
}
],
"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": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-62389"
]
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
Loading…
Loading…