UBUNTU-CVE-2026-116579

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Source
https://ubuntu.com/security/CVE-2026-116579
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116579.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-116579
Upstream
Published
2026-10-26T21:18:00Z
Modified
2026-10-28T20:15:58Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Autobahn Python is a WebSocket and WAMP implementation for Python that supports Twisted and asyncio. From 26.7.1 until 26.10.1, PerMessageBrotli.decompress_message_data in compress_brotli.py calls the Brotli decompressor without an output limit and checks maxMessagePayloadSize only after a complete frame has been inflated. An unauthenticated WebSocket client can send a small, highly compressed frame that allocates hundreds of MiB before rejection, causing memory-exhaustion denial of service on servers that enable the opt-in permessage-brotli feature through the compress extra. Deflate and bzip2 already enforce the remaining output budget and are outside this residual vulnerability. This issue is fixed in version 26.10.1.

References

Affected packages

Ubuntu:16.04:LTS
python-autobahn

Package

Name
python-autobahn
Purl
pkg:deb/ubuntu/python-autobahn?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.10.3+dfsg1-2
0.10.3+dfsg1-3
0.10.3+dfsg1-5

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python-autobahn",
            "binary_version":  "0.10.3+dfsg1-5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116579.json"
Ubuntu:18.04:LTS
python-autobahn

Package

Name
python-autobahn
Purl
pkg:deb/ubuntu/python-autobahn?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.14.1+dfsg1-2ubuntu1
17.*
17.10.1+dfsg1-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python-autobahn",
            "binary_version":  "17.10.1+dfsg1-2"
        },
        {
            "binary_name":  "python3-autobahn",
            "binary_version":  "17.10.1+dfsg1-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116579.json"
Ubuntu:20.04:LTS
python-autobahn

Package

Name
python-autobahn
Purl
pkg:deb/ubuntu/python-autobahn?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

17.*
17.10.1+dfsg1-5
17.10.1+dfsg1-6

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-autobahn",
            "binary_version":  "17.10.1+dfsg1-6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116579.json"
Ubuntu:22.04:LTS
python-autobahn

Package

Name
python-autobahn
Purl
pkg:deb/ubuntu/python-autobahn?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

17.*
17.10.1+dfsg1-7
21.*
21.11.1+dfsg1-2
21.11.1+dfsg1-2build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-autobahn",
            "binary_version":  "21.11.1+dfsg1-2build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116579.json"
Ubuntu:24.04:LTS
python-autobahn

Package

Name
python-autobahn
Purl
pkg:deb/ubuntu/python-autobahn?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

22.*
22.7.1+dfsg1-3
22.7.1+dfsg1-4

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-autobahn",
            "binary_version":  "22.7.1+dfsg1-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116579.json"
Ubuntu:26.04:LTS
python-autobahn

Package

Name
python-autobahn
Purl
pkg:deb/ubuntu/python-autobahn?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

23.*
23.1.2+dfsg1-2
24.*
24.4.2+dfsg1-4
24.4.2+dfsg1-5

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-autobahn",
            "binary_version":  "24.4.2+dfsg1-5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116579.json"
Ubuntu:26.10
python-autobahn

Package

Name
python-autobahn
Purl
pkg:deb/ubuntu/python-autobahn?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

24.*
24.4.2+dfsg1-5

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-autobahn",
            "binary_version":  "24.4.2+dfsg1-5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116579.json"