USN-8398-3

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Source
https://ubuntu.com/security/notices/USN-8398-3
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8398-3.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8398-3
Upstream
Related
Published
2026-06-15T12:44:22Z
Modified
2026-06-15T20:29:22.130819054Z
Summary
nginx vulnerability
Details

USN-8398-1 fixed a vulnerability in nginx. The update caused a regression and was temporarily reverted in USN-8398-2. This update introduces a complete fix for CVE-2026-49975.

We apologize for the inconvenience.

Original advisory details:

It was discovered that nginx incorrectly handled certain cookie headers in the HTTP/2 implementation. A remote attacker could possibly use this issue to cause nginx to consume excessive resources, resulting in a denial of service.

References

Affected packages

Ubuntu:22.04:LTS / nginx

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.18.0-6ubuntu14.15

Affected versions

1.*
1.18.0-6ubuntu11
1.18.0-6ubuntu12
1.18.0-6ubuntu14
1.18.0-6ubuntu14.1
1.18.0-6ubuntu14.2
1.18.0-6ubuntu14.3
1.18.0-6ubuntu14.4
1.18.0-6ubuntu14.5
1.18.0-6ubuntu14.6
1.18.0-6ubuntu14.7
1.18.0-6ubuntu14.8
1.18.0-6ubuntu14.10
1.18.0-6ubuntu14.11
1.18.0-6ubuntu14.12
1.18.0-6ubuntu14.13
1.18.0-6ubuntu14.14

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-auth-pam"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-cache-purge"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-dav-ext"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-echo"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-fancyindex"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-geoip"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-geoip2"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-headers-more-filter"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-image-filter"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-ndk"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-perl"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-subs-filter"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-uploadprogress"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-upstream-fair"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-http-xslt-filter"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-mail"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-nchan"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-rtmp"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-stream"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-stream-geoip"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "libnginx-mod-stream-geoip2"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "nginx"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "nginx-common"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "nginx-core"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "nginx-extras"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "nginx-full"
        },
        {
            "binary_version": "1.18.0-6ubuntu14.15",
            "binary_name": "nginx-light"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8398-3.json"
cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-49975"
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}

Ubuntu:24.04:LTS / nginx

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.24.0-2ubuntu7.12

Affected versions

1.*
1.24.0-1ubuntu1
1.24.0-2ubuntu1
1.24.0-2ubuntu2
1.24.0-2ubuntu3
1.24.0-2ubuntu4
1.24.0-2ubuntu6
1.24.0-2ubuntu7
1.24.0-2ubuntu7.1
1.24.0-2ubuntu7.3
1.24.0-2ubuntu7.4
1.24.0-2ubuntu7.5
1.24.0-2ubuntu7.6
1.24.0-2ubuntu7.7
1.24.0-2ubuntu7.8
1.24.0-2ubuntu7.9
1.24.0-2ubuntu7.10
1.24.0-2ubuntu7.11

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "libnginx-mod-http-geoip"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "libnginx-mod-http-image-filter"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "libnginx-mod-http-perl"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "libnginx-mod-http-xslt-filter"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "libnginx-mod-mail"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "libnginx-mod-stream"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "libnginx-mod-stream-geoip"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "nginx"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "nginx-common"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "nginx-core"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "nginx-extras"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "nginx-full"
        },
        {
            "binary_version": "1.24.0-2ubuntu7.12",
            "binary_name": "nginx-light"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8398-3.json"
cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-49975"
        }
    ],
    "ecosystem": "Ubuntu:24.04:LTS"
}

Ubuntu:25.10 / nginx

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.28.0-6ubuntu1.7

Affected versions

1.*
1.26.3-2ubuntu1
1.26.3-3ubuntu1
1.26.3-3ubuntu2
1.26.3-3ubuntu3
1.28.0-3ubuntu1
1.28.0-4ubuntu1
1.28.0-6ubuntu1
1.28.0-6ubuntu1.1
1.28.0-6ubuntu1.2
1.28.0-6ubuntu1.3
1.28.0-6ubuntu1.4
1.28.0-6ubuntu1.5
1.28.0-6ubuntu1.6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "libnginx-mod-http-geoip"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "libnginx-mod-http-image-filter"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "libnginx-mod-http-perl"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "libnginx-mod-http-xslt-filter"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "libnginx-mod-mail"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "libnginx-mod-stream"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "libnginx-mod-stream-geoip"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "nginx"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "nginx-common"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "nginx-core"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "nginx-extras"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "nginx-full"
        },
        {
            "binary_version": "1.28.0-6ubuntu1.7",
            "binary_name": "nginx-light"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8398-3.json"
cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-49975"
        }
    ],
    "ecosystem": "Ubuntu:25.10"
}

Ubuntu:26.04:LTS / nginx

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.28.3-2ubuntu1.5

Affected versions

1.*
1.28.0-6ubuntu1
1.28.1-2ubuntu1
1.28.1-3ubuntu1
1.28.2-2ubuntu1
1.28.3-2ubuntu1
1.28.3-2ubuntu1.1
1.28.3-2ubuntu1.2
1.28.3-2ubuntu1.3
1.28.3-2ubuntu1.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "libnginx-mod-http-geoip"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "libnginx-mod-http-image-filter"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "libnginx-mod-http-perl"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "libnginx-mod-http-xslt-filter"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "libnginx-mod-mail"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "libnginx-mod-stream"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "libnginx-mod-stream-geoip"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "nginx"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "nginx-common"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "nginx-core"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "nginx-extras"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "nginx-full"
        },
        {
            "binary_version": "1.28.3-2ubuntu1.5",
            "binary_name": "nginx-light"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8398-3.json"
cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-49975"
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}