USN-8822-1 (UBUNTU-CVE-2026-10650)
Vulnerability from osv_ubuntu – Published: 2026-09-25 02:39 – Updated: 2026-09-25 02:39 – Source website
VLAI
Summary
libwebsockets vulnerabilities
Details
It was discovered that Libwebsockets incorrectly handled certain SSH protocol messages in its SSH protocol handler. A remote attacker could possibly use this issue to cause Libwebsockets to consume excessive resources, resulting in a denial of service. (CVE-2026-10650)
It was discovered that Libwebsockets incorrectly handled certain malformed CBOR data. A remote attacker could possibly use this issue to cause Libwebsockets to crash, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-78161)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-10650",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libwebsockets-test-server",
"binary_version": "3.2.1-3ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets-test-server-common",
"binary_version": "3.2.1-3ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets15",
"binary_version": "3.2.1-3ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "libwebsockets",
"purl": "pkg:deb/ubuntu/libwebsockets@3.2.1-3ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.2.1-3ubuntu0.1~esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.3-3build1",
"3.2.1-3",
"3.2.1-3ubuntu0.1~esm1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-10650",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libwebsockets-test-server",
"binary_version": "4.0.20-2ubuntu1.1+esm1"
},
{
"binary_name": "libwebsockets-test-server-common",
"binary_version": "4.0.20-2ubuntu1.1+esm1"
},
{
"binary_name": "libwebsockets16",
"binary_version": "4.0.20-2ubuntu1.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "libwebsockets",
"purl": "pkg:deb/ubuntu/libwebsockets@4.0.20-2ubuntu1.1+esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.0.20-2ubuntu1.1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.0.20-2",
"4.0.20-2ubuntu1",
"4.0.20-2ubuntu1.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-10650",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-78161",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:24.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libwebsockets-evlib-ev",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets-evlib-glib",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets-evlib-uv",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets-test-server",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets-test-server-common",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
},
{
"binary_name": "libwebsockets19t64",
"binary_version": "4.3.3-1.1ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "libwebsockets",
"purl": "pkg:deb/ubuntu/libwebsockets@4.3.3-1.1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.3.3-1.1ubuntu0.1~esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.3.2-4",
"4.3.3-1",
"4.3.3-1.1build1",
"4.3.3-1.1build2",
"4.3.3-1.1build3",
"4.3.3-1.1ubuntu0.1~esm1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-10650",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-78161",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libwebsockets-evlib-ev",
"binary_version": "4.3.5-3ubuntu1.1"
},
{
"binary_name": "libwebsockets-evlib-glib",
"binary_version": "4.3.5-3ubuntu1.1"
},
{
"binary_name": "libwebsockets-evlib-uv",
"binary_version": "4.3.5-3ubuntu1.1"
},
{
"binary_name": "libwebsockets-test-server",
"binary_version": "4.3.5-3ubuntu1.1"
},
{
"binary_name": "libwebsockets-test-server-common",
"binary_version": "4.3.5-3ubuntu1.1"
},
{
"binary_name": "libwebsockets19t64",
"binary_version": "4.3.5-3ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "libwebsockets",
"purl": "pkg:deb/ubuntu/libwebsockets@4.3.5-3ubuntu1.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.3.5-3ubuntu1.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.3.5-1",
"4.3.5-3",
"4.3.5-3ubuntu1"
]
}
],
"aliases": [],
"details": "It was discovered that Libwebsockets incorrectly handled certain SSH\nprotocol messages in its SSH protocol handler. A remote attacker could\npossibly use this issue to cause Libwebsockets to consume excessive\nresources, resulting in a denial of service. (CVE-2026-10650)\n\nIt was discovered that Libwebsockets incorrectly handled certain malformed\nCBOR data. A remote attacker could possibly use this issue to cause\nLibwebsockets to crash, resulting in a denial of service, or execute\narbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04\nLTS. (CVE-2026-78161)",
"id": "USN-8822-1",
"modified": "2026-09-25T02:39:11Z",
"published": "2026-09-25T02:39:11Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8822-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-10650"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-78161"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "libwebsockets vulnerabilities",
"upstream": [
"UBUNTU-CVE-2026-10650",
"UBUNTU-CVE-2026-78161"
]
}
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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.
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- 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.
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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.
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.
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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