USN-8495-1

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Source
https://ubuntu.com/security/notices/USN-8495-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8495-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8495-1
Upstream
Related
Published
2026-07-02T13:57:53Z
Modified
2026-07-02T18:19:26.231523093Z
Summary
nghttp2 vulnerability
Details

It was discovered that the nghttp2 nghttpx proxy incorrectly handled HTTP/1.1 Upgrade requests that included a Content-Length header and body. A remote attacker could possibly use this issue to perform HTTP request and response smuggling attacks against backend services.

References

Affected packages

Ubuntu:22.04:LTS / nghttp2

Package

Name
nghttp2
Purl
pkg:deb/ubuntu/nghttp2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.43.0-1ubuntu0.4

Affected versions

1.*
1.43.0-1
1.43.0-1build1
1.43.0-1build2
1.43.0-1build3
1.43.0-1ubuntu0.1
1.43.0-1ubuntu0.2
1.43.0-1ubuntu0.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.43.0-1ubuntu0.4",
            "binary_name": "libnghttp2-14"
        },
        {
            "binary_version": "1.43.0-1ubuntu0.4",
            "binary_name": "nghttp2"
        },
        {
            "binary_version": "1.43.0-1ubuntu0.4",
            "binary_name": "nghttp2-client"
        },
        {
            "binary_version": "1.43.0-1ubuntu0.4",
            "binary_name": "nghttp2-proxy"
        },
        {
            "binary_version": "1.43.0-1ubuntu0.4",
            "binary_name": "nghttp2-server"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8495-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-58055",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:24.04:LTS / nghttp2

Package

Name
nghttp2
Purl
pkg:deb/ubuntu/nghttp2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.59.0-1ubuntu0.4

Affected versions

1.*
1.55.1-1
1.57.0-1
1.58.0-1
1.59.0-1
1.59.0-1build1
1.59.0-1build2
1.59.0-1build4
1.59.0-1ubuntu0.1
1.59.0-1ubuntu0.2
1.59.0-1ubuntu0.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.59.0-1ubuntu0.4",
            "binary_name": "libnghttp2-14"
        },
        {
            "binary_version": "1.59.0-1ubuntu0.4",
            "binary_name": "nghttp2"
        },
        {
            "binary_version": "1.59.0-1ubuntu0.4",
            "binary_name": "nghttp2-client"
        },
        {
            "binary_version": "1.59.0-1ubuntu0.4",
            "binary_name": "nghttp2-proxy"
        },
        {
            "binary_version": "1.59.0-1ubuntu0.4",
            "binary_name": "nghttp2-server"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8495-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-58055",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:25.10 / nghttp2

Package

Name
nghttp2
Purl
pkg:deb/ubuntu/nghttp2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.64.0-1.1ubuntu1.2

Affected versions

1.*
1.64.0-1ubuntu1
1.64.0-1.1
1.64.0-1.1build1
1.64.0-1.1ubuntu1
1.64.0-1.1ubuntu1.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.64.0-1.1ubuntu1.2",
            "binary_name": "libnghttp2-14"
        },
        {
            "binary_version": "1.64.0-1.1ubuntu1.2",
            "binary_name": "nghttp2"
        },
        {
            "binary_version": "1.64.0-1.1ubuntu1.2",
            "binary_name": "nghttp2-client"
        },
        {
            "binary_version": "1.64.0-1.1ubuntu1.2",
            "binary_name": "nghttp2-proxy"
        },
        {
            "binary_version": "1.64.0-1.1ubuntu1.2",
            "binary_name": "nghttp2-server"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8495-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "id": "CVE-2026-58055",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}

Ubuntu:26.04:LTS / nghttp2

Package

Name
nghttp2
Purl
pkg:deb/ubuntu/nghttp2?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.68.0-2ubuntu0.2

Affected versions

1.*
1.64.0-1.1ubuntu1
1.64.0-1.1ubuntu2
1.68.0-1
1.68.0-2
1.68.0-2ubuntu0.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.68.0-2ubuntu0.2",
            "binary_name": "libnghttp2-14"
        },
        {
            "binary_version": "1.68.0-2ubuntu0.2",
            "binary_name": "nghttp2"
        },
        {
            "binary_version": "1.68.0-2ubuntu0.2",
            "binary_name": "nghttp2-client"
        },
        {
            "binary_version": "1.68.0-2ubuntu0.2",
            "binary_name": "nghttp2-proxy"
        },
        {
            "binary_version": "1.68.0-2ubuntu0.2",
            "binary_name": "nghttp2-server"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8495-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:26.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-58055",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N"
                },
                {
                    "type": "CVSS_V4",
                    "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ]
}