UBUNTU-CVE-2026-19773

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Source
https://ubuntu.com/security/CVE-2026-19773
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19773.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-19773
Upstream
Published
2026-09-16T00:00:00Z
Modified
2026-09-17T13:30:05Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

(libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Rem ...)

References

Affected packages

Ubuntu:16.04:LTS
libwebsockets

Package

Name
libwebsockets
Purl
pkg:deb/ubuntu/libwebsockets?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "1.7.1-1"
        },
        {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "1.7.1-1"
        },
        {
            "binary_name": "libwebsockets7",
            "binary_version": "1.7.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19773.json"
Ubuntu:18.04:LTS
libwebsockets

Package

Name
libwebsockets
Purl
pkg:deb/ubuntu/libwebsockets?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.0.3-3
2.0.3-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "2.0.3-3build1"
        },
        {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "2.0.3-3build1"
        },
        {
            "binary_name": "libwebsockets8",
            "binary_version": "2.0.3-3build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19773.json"
Ubuntu:22.04:LTS
libwebsockets

Package

Name
libwebsockets
Purl
pkg:deb/ubuntu/libwebsockets?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.0.20-2
4.0.20-2ubuntu1
4.0.20-2ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "4.0.20-2ubuntu1.1"
        },
        {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "4.0.20-2ubuntu1.1"
        },
        {
            "binary_name": "libwebsockets16",
            "binary_version": "4.0.20-2ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19773.json"
Ubuntu:26.04:LTS
libwebsockets

Package

Name
libwebsockets
Purl
pkg:deb/ubuntu/libwebsockets?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.3.5-1
4.3.5-3
4.3.5-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libwebsockets-evlib-ev",
            "binary_version": "4.3.5-3ubuntu1"
        },
        {
            "binary_name": "libwebsockets-evlib-glib",
            "binary_version": "4.3.5-3ubuntu1"
        },
        {
            "binary_name": "libwebsockets-evlib-uv",
            "binary_version": "4.3.5-3ubuntu1"
        },
        {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "4.3.5-3ubuntu1"
        },
        {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "4.3.5-3ubuntu1"
        },
        {
            "binary_name": "libwebsockets19t64",
            "binary_version": "4.3.5-3ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19773.json"
Ubuntu:Pro:20.04:LTS
libwebsockets

Package

Name
libwebsockets
Purl
pkg:deb/ubuntu/libwebsockets?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.0.3-3build1
3.*
3.2.1-3
3.2.1-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "3.2.1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "3.2.1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets15",
            "binary_version": "3.2.1-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19773.json"
Ubuntu:Pro:24.04:LTS
libwebsockets

Package

Name
libwebsockets
Purl
pkg:deb/ubuntu/libwebsockets?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libwebsockets-evlib-ev",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets-evlib-glib",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets-evlib-uv",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets-test-server",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets-test-server-common",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libwebsockets19t64",
            "binary_version": "4.3.3-1.1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19773.json"