USN-8956-2

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Source
https://ubuntu.com/security/notices/USN-8956-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8956-2.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8956-2
Upstream
Related
Published
2026-10-27T21:14:45Z
Modified
2026-10-29T02:43:13Z
Summary
brotli vulnerability
Details

USN-8956-1 fixed a vulnerability in Brotli. This update provides the corresponding fixes for Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.

Original advisory 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:Pro:16.04:LTS / brotli

Package

Name
brotli
Purl
pkg:deb/ubuntu/brotli?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.3-1ubuntu1~16.04.2+esm1

Affected versions

0.*
0.2.0+dfsg-1
0.3.0+dfsg-1
0.3.0+dfsg-2
0.3.0+dfsg-2ubuntu1
1.*
1.0.3-1ubuntu1~16.04.1
1.0.3-1ubuntu1~16.04.2

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "brotli",
            "binary_version":  "1.0.3-1ubuntu1~16.04.2+esm1"
        },
        {
            "binary_name":  "libbrotli1",
            "binary_version":  "1.0.3-1ubuntu1~16.04.2+esm1"
        },
        {
            "binary_name":  "python-brotli",
            "binary_version":  "1.0.3-1ubuntu1~16.04.2+esm1"
        },
        {
            "binary_name":  "python3-brotli",
            "binary_version":  "1.0.3-1ubuntu1~16.04.2+esm1"
        }
    ]
}

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":  "high",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:Pro:16.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8956-2.json"

Ubuntu:Pro:18.04:LTS / brotli

Package

Name
brotli
Purl
pkg:deb/ubuntu/brotli?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.3-1ubuntu1.3+esm1

Affected versions

0.*
0.6.0-1build1
1.*
1.0.2-2
1.0.2-3
1.0.3-1ubuntu1
1.0.3-1ubuntu1.2
1.0.3-1ubuntu1.3

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "brotli",
            "binary_version":  "1.0.3-1ubuntu1.3+esm1"
        },
        {
            "binary_name":  "libbrotli1",
            "binary_version":  "1.0.3-1ubuntu1.3+esm1"
        },
        {
            "binary_name":  "python-brotli",
            "binary_version":  "1.0.3-1ubuntu1.3+esm1"
        },
        {
            "binary_name":  "python3-brotli",
            "binary_version":  "1.0.3-1ubuntu1.3+esm1"
        }
    ]
}

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":  "high",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:Pro:18.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8956-2.json"

Ubuntu:Pro:20.04:LTS / brotli

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.7-6ubuntu0.1+esm1

Affected versions

1.*
1.0.7-2
1.0.7-2build1
1.0.7-4
1.0.7-5
1.0.7-6
1.0.7-6build1
1.0.7-6ubuntu0.1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "brotli",
            "binary_version":  "1.0.7-6ubuntu0.1+esm1"
        },
        {
            "binary_name":  "libbrotli1",
            "binary_version":  "1.0.7-6ubuntu0.1+esm1"
        },
        {
            "binary_name":  "python3-brotli",
            "binary_version":  "1.0.7-6ubuntu0.1+esm1"
        }
    ]
}

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":  "high",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8956-2.json"