USN-8459-1

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Source
https://ubuntu.com/security/notices/USN-8459-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8459-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8459-1
Upstream
Related
Published
2026-06-22T13:55:06Z
Modified
2026-06-22T20:19:14.174459482Z
Summary
haproxy vulnerabilities
Details

It was discovered that HAProxy incorrectly handled the FCGI demultiplexer record length field. A remote attacker could possibly use this issue to cause incorrect request routing, response smuggling, or other memory safety issues. (CVE-2026-55203)

It was discovered that HAProxy failed to validate the return value of the HPACK dynamic table defragmentation function when memory was exhausted. A remote attacker could possibly use this issue to cause HAProxy to crash, resulting in a denial of service. (CVE-2026-55204)

References

Affected packages

Ubuntu:22.04:LTS / haproxy

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.30-0ubuntu0.22.04.2

Affected versions

2.*
2.2.9-2ubuntu2
2.4.8-1
2.4.8-2ubuntu3
2.4.11-1ubuntu1
2.4.12-1ubuntu1
2.4.12-1ubuntu2
2.4.13-1ubuntu1
2.4.14-1ubuntu1
2.4.18-0ubuntu1
2.4.18-0ubuntu1.1
2.4.18-0ubuntu1.2
2.4.18-0ubuntu1.3
2.4.22-0ubuntu0.22.04.1
2.4.22-0ubuntu0.22.04.2
2.4.22-0ubuntu0.22.04.3
2.4.24-0ubuntu0.22.04.1
2.4.24-0ubuntu0.22.04.2
2.4.24-0ubuntu0.22.04.3
2.4.29-0ubuntu0.22.04.1
2.4.30-0ubuntu0.22.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.4.30-0ubuntu0.22.04.2",
            "binary_name": "haproxy"
        },
        {
            "binary_version": "2.4.30-0ubuntu0.22.04.2",
            "binary_name": "vim-haproxy"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N"
                },
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-55203"
        },
        {
            "id": "CVE-2026-55204",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8459-1.json"

Ubuntu:24.04:LTS / haproxy

Package

Name
haproxy
Purl
pkg:deb/ubuntu/haproxy?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.8.16-0ubuntu0.24.04.3

Affected versions

2.*
2.6.15-1ubuntu2
2.8.5-1ubuntu1
2.8.5-1ubuntu2
2.8.5-1ubuntu3
2.8.5-1ubuntu3.1
2.8.5-1ubuntu3.2
2.8.5-1ubuntu3.3
2.8.5-1ubuntu3.4
2.8.15-0ubuntu0.24.04.1
2.8.16-0ubuntu0.24.04.1
2.8.16-0ubuntu0.24.04.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.8.16-0ubuntu0.24.04.3",
            "binary_name": "haproxy"
        },
        {
            "binary_version": "2.8.16-0ubuntu0.24.04.3",
            "binary_name": "vim-haproxy"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-55203",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N"
                },
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-55204",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8459-1.json"

Ubuntu:25.10 / haproxy

Package

Name
haproxy
Purl
pkg:deb/ubuntu/haproxy?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.0.12-0ubuntu0.25.10.5

Affected versions

3.*
3.0.8-1ubuntu1
3.0.8-1ubuntu1.1
3.0.10-1ubuntu1
3.0.10-1ubuntu2
3.0.10-1ubuntu3
3.0.12-0ubuntu0.25.10.1
3.0.12-0ubuntu0.25.10.3
3.0.12-0ubuntu0.25.10.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "3.0.12-0ubuntu0.25.10.5",
            "binary_name": "haproxy"
        },
        {
            "binary_version": "3.0.12-0ubuntu0.25.10.5",
            "binary_name": "vim-haproxy"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-55203",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N"
                },
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-55204",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:25.10"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8459-1.json"

Ubuntu:26.04:LTS / haproxy

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.2.9-1ubuntu2.2

Affected versions

3.*
3.0.10-1ubuntu3
3.2.9-1ubuntu1
3.2.9-1ubuntu2
3.2.9-1ubuntu2.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "3.2.9-1ubuntu2.2",
            "binary_name": "haproxy"
        },
        {
            "binary_version": "3.2.9-1ubuntu2.2",
            "binary_name": "vim-haproxy"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-55203",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N"
                },
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "CVSS_V4",
                    "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": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-55204"
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8459-1.json"