UBUNTU-CVE-2026-77528

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Source
https://ubuntu.com/security/CVE-2026-77528
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-77528.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-77528
Upstream
Published
2026-09-21T00:00:00Z
Modified
2026-09-21T21:41:10Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Autobahn Python is a WebSocket and WAMP implementation for Python that supports Twisted and asyncio. Prior to 26.7.1, WebSocket endpoints that accept permessage-deflate and rely on maxMessagePayloadSize enforce that limit against the compressed frame length before inflation but do not recheck the decompressed message size before delivery. A remote unauthenticated client can send a valid compressed frame below the configured wire-size limit that expands beyond the application message limit, causing oversized data to be allocated, joined, validated, and passed to application callbacks. This can create resource-exhaustion pressure, but the advisory does not establish confidentiality or integrity impact. This issue is fixed in version 26.7.1.

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-2026-77528.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-2026-77528.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-2026-77528.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-2026-77528.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-2026-77528.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-2026-77528.json"