UnratedFix available
libwebsockets vulnerabilities
Type: advisorySources: OSV
It was discovered that libwebsockets did not properly validate user-supplied data when parsing HTTP/2 HPACK path headers, which could result in a write past the end of an allocated buffer. An attacker could possibly use this issue to execute arbitrary code. (CVE-2026-19773) It was discovered that libwebsockets did not properly handle CBOR recording in the LECP parser, which could result in a write past the end of an allocated buffer. An attacker could possibly use this issue to cause a crash or execute arbitrary code. (CVE-2026-78161)
- Products
- libwebsockets
- Affected versions
- 1.2.2-1, 1.6.0-3, 1.6.0-4, 1.6.0-5, 1.6.1-1, 1.7.0-1ubuntu1, 1.7.0-2, 1.7.1-1, 2.0.3-3, 2.0.3-3build1, 3.2.1-3, 3.2.1-3ubuntu0.1~esm1, 3.2.1-3ubuntu0.1~esm2, 4.0.20-2, 4.0.20-2ubuntu1, 4.0.20-2ubuntu1.1, 4.0.20-2ubuntu1.1+esm1, 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, 4.3.3-1.1ubuntu0.1~esm2, 4.3.5-1, 4.3.5-3, 4.3.5-3ubuntu1, 4.3.5-3ubuntu1.1
- Fixed versions
- 1.7.1-1ubuntu0.1~esm1, 2.0.3-3ubuntu0.1~esm1, 3.2.1-3ubuntu0.1~esm3, 4.0.20-2ubuntu1.1+esm2, 4.3.3-1.1ubuntu0.1~esm3, 4.3.5-3ubuntu1.2+esm1
- CVEs
- CVE-2026-19773
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 09:09 UTC · Revision 1
Source evidence
It was discovered that libwebsockets did not properly validate user-supplied data when parsing HTTP/2 HPACK path headers, which could result in a write past the end of an allocated buffer. An attacker could possibly use this issue to execute arbitrary code. (CVE-2026-19773) It was discovered that libwebsockets did not properly handle CBOR recording in the LECP parser, which could result in a write past the end of an allocated buffer. An attacker could possibly use this issue to cause a crash or execute arbitrary code. (CVE-2026-78161)
osv:USN-8893-1
libwebsockets
Fixed versions: 1.7.1-1ubuntu0.1~esm1
libwebsockets
Fixed versions: 2.0.3-3ubuntu0.1~esm1
libwebsockets
Fixed versions: 3.2.1-3ubuntu0.1~esm3
libwebsockets
Fixed versions: 4.0.20-2ubuntu1.1+esm2
libwebsockets
Fixed versions: 4.3.3-1.1ubuntu0.1~esm3
libwebsockets
Fixed versions: 4.3.5-3ubuntu1.2+esm1
Complete source record
{
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"url": "https://osv.dev/vulnerability/USN-8893-1",
"method": "structured",
"payload": {
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"title": "libwebsockets vulnerabilities",
"summary": "It was discovered that libwebsockets did not properly validate user-supplied data when parsing HTTP/2 HPACK path headers, which could result in a write past the end of an allocated buffer. An attacker could possibly use this issue to execute arbitrary code. (CVE-2026-19773) It was discovered that libwebsockets did not properly handle CBOR recording in the LECP parser, which could result in a write past the end of an allocated buffer. An attacker could possibly use this issue to cause a crash or execute arbitrary code. (CVE-2026-78161)",
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],
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}
}
],
"modified": "2026-10-08T12:58:05.069798336Z",
"provider": "osv",
"upstream": [
"CVE-2026-19773",
"UBUNTU-CVE-2026-19773"
],
"references": [
"https://ubuntu.com/security/notices/USN-8893-1",
"https://ubuntu.com/security/CVE-2026-19773"
]
},
"related_cves": [
{
"value": "CVE-2026-19773",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 99614,
"published_at": "2026-10-07T10:05:38+00:00"
}