USN-8956-1

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Source
https://ubuntu.com/security/notices/USN-8956-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8956-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-8956-1
Upstream
Related
Published
2026-10-26T15:54:30Z
Modified
2026-10-27T04:18:00Z
Summary
brotli vulnerability
Details

It was discovered that Brotli incorrectly handled certain compressed streams. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code.

References

Affected packages

Ubuntu:22.04:LTS / brotli

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.9-2ubuntu0.1

Affected versions

1.*
1.0.9-2build3
1.0.9-2build4
1.0.9-2build5
1.0.9-2build6

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "brotli",
            "binary_version":  "1.0.9-2ubuntu0.1"
        },
        {
            "binary_name":  "libbrotli1",
            "binary_version":  "1.0.9-2ubuntu0.1"
        },
        {
            "binary_name":  "python3-brotli",
            "binary_version":  "1.0.9-2ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-111497",
            "severity":  [
                {
                    "score":  "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type":  "CVSS_V4"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8956-1.json"

Ubuntu:24.04:LTS / brotli

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.1.0-2ubuntu0.1

Affected versions

1.*
1.0.9-2build8
1.1.0-1
1.1.0-2~build1
1.1.0-2
1.1.0-2build1
1.1.0-2build2

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "brotli",
            "binary_version":  "1.1.0-2ubuntu0.1"
        },
        {
            "binary_name":  "libbrotli1",
            "binary_version":  "1.1.0-2ubuntu0.1"
        },
        {
            "binary_name":  "python3-brotli",
            "binary_version":  "1.1.0-2ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-111497",
            "severity":  [
                {
                    "score":  "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type":  "CVSS_V4"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8956-1.json"

Ubuntu:26.10 / brotli

Package

Name
brotli
Purl
pkg:deb/ubuntu/brotli?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.2.0-4ubuntu0.1

Affected versions

1.*
1.2.0-3build1
1.2.0-4

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "brotli",
            "binary_version":  "1.2.0-4ubuntu0.1"
        },
        {
            "binary_name":  "libbrotli1",
            "binary_version":  "1.2.0-4ubuntu0.1"
        },
        {
            "binary_name":  "python3-brotli",
            "binary_version":  "1.2.0-4ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-111497",
            "severity":  [
                {
                    "score":  "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type":  "CVSS_V4"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:26.10"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8956-1.json"

Ubuntu:26.04:LTS / brotli

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.2.0-3ubuntu0.1

Affected versions

1.*
1.1.0-2build5
1.1.0-2build6
1.2.0-3
1.2.0-3build1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "brotli",
            "binary_version":  "1.2.0-3ubuntu0.1"
        },
        {
            "binary_name":  "libbrotli1",
            "binary_version":  "1.2.0-3ubuntu0.1"
        },
        {
            "binary_name":  "python3-brotli",
            "binary_version":  "1.2.0-3ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-111497",
            "severity":  [
                {
                    "score":  "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type":  "CVSS_V4"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8956-1.json"