UBUNTU-CVE-2026-115778

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Source
https://ubuntu.com/security/CVE-2026-115778
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115778.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-115778
Upstream
Published
2026-10-26T00:00:00Z
Modified
2026-10-27T04:17:49Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.conch.telnet.Telnet.dataReceived appends every byte received after IAC SB to a persistent subnegotiation buffer until IAC SE is received, without applying a maximum length. Telnet option negotiation occurs before authentication, so an unauthenticated peer can omit the terminator and continuously grow the buffer. The resulting memory exhaustion can terminate the process and every service it hosts. This issue is fixed in version 26.10.0rc1.

References

Affected packages

Ubuntu:20.04:LTS
twisted

Package

Name
twisted
Purl
pkg:deb/ubuntu/twisted?arch=source&distro=focal

Affected ranges

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

Affected versions

18.*
18.9.0-3ubuntu1
18.9.0-5
18.9.0-6
18.9.0-6build1
18.9.0-6ubuntu1
18.9.0-8
18.9.0-11
18.9.0-11ubuntu0.20.04.1
18.9.0-11ubuntu0.20.04.2
18.9.0-11ubuntu0.20.04.3
18.9.0-11ubuntu0.20.04.4
18.9.0-11ubuntu0.20.04.5

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-twisted",
            "binary_version":  "18.9.0-11ubuntu0.20.04.5"
        },
        {
            "binary_name":  "python3-twisted-bin",
            "binary_version":  "18.9.0-11ubuntu0.20.04.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115778.json"
Ubuntu:22.04:LTS
twisted

Package

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

Affected ranges

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

Affected versions

20.*
20.3.0-7ubuntu1
20.3.0-7ubuntu3
22.*
22.1.0-2ubuntu2
22.1.0-2ubuntu2.1
22.1.0-2ubuntu2.3
22.1.0-2ubuntu2.4
22.1.0-2ubuntu2.5
22.1.0-2ubuntu2.6
22.1.0-2ubuntu2.7

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-twisted",
            "binary_version":  "22.1.0-2ubuntu2.7"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115778.json"
Ubuntu:24.04:LTS
twisted

Package

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

Affected ranges

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

Affected versions

22.*
22.4.0-4
22.4.0-4ubuntu1
23.*
23.10.0-2
24.*
24.3.0-1
24.3.0-1ubuntu0.1
24.3.0-1ubuntu0.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-twisted",
            "binary_version":  "24.3.0-1ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115778.json"
Ubuntu:26.04:LTS
twisted

Package

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

Affected ranges

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

Affected versions

24.*
24.11.0-1
25.*
25.5.0-4
25.5.0-5
25.5.0-5ubuntu0.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-twisted",
            "binary_version":  "25.5.0-5ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115778.json"
Ubuntu:26.10
twisted

Package

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

Affected ranges

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

Affected versions

25.*
25.5.0-5
26.*
26.4.0-4

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python3-twisted",
            "binary_version":  "26.4.0-4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115778.json"
Ubuntu:Pro:14.04:LTS
twisted

Package

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

Affected ranges

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

Affected versions

13.*
13.0.0-1ubuntu1
13.2.0-1ubuntu1
13.2.0-1ubuntu1.2
13.2.0-1ubuntu1.2+esm1
13.2.0-1ubuntu1.2+esm2
13.2.0-1ubuntu1.2+esm3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python-twisted",
            "binary_version":  "13.2.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name":  "python-twisted-bin",
            "binary_version":  "13.2.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name":  "python-twisted-conch",
            "binary_version":  "1:13.2.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name":  "python-twisted-core",
            "binary_version":  "13.2.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name":  "python-twisted-lore",
            "binary_version":  "13.2.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name":  "python-twisted-mail",
            "binary_version":  "13.2.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name":  "python-twisted-names",
            "binary_version":  "13.2.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name":  "python-twisted-news",
            "binary_version":  "13.2.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name":  "python-twisted-runner",
            "binary_version":  "13.2.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name":  "python-twisted-web",
            "binary_version":  "13.2.0-1ubuntu1.2+esm3"
        },
        {
            "binary_name":  "python-twisted-words",
            "binary_version":  "13.2.0-1ubuntu1.2+esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115778.json"
Ubuntu:Pro:16.04:LTS
twisted

Package

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

Affected ranges

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

Affected versions

15.*
15.2.1-1ubuntu2
15.5.0-1
15.5.0-2
15.5.0-2ubuntu1
15.5.0-4
16.*
16.0.0~pre1-1
16.0.0~pre1-1ubuntu1
16.0.0~pre1-2ubuntu1
16.0.0~pre1-3
16.0.0-1
16.0.0-1ubuntu0.2
16.0.0-1ubuntu0.4
16.0.0-1ubuntu0.4+esm1
16.0.0-1ubuntu0.4+esm2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python-twisted",
            "binary_version":  "16.0.0-1ubuntu0.4+esm2"
        },
        {
            "binary_name":  "python-twisted-bin",
            "binary_version":  "16.0.0-1ubuntu0.4+esm2"
        },
        {
            "binary_name":  "python-twisted-conch",
            "binary_version":  "1:16.0.0-1ubuntu0.4+esm2"
        },
        {
            "binary_name":  "python-twisted-core",
            "binary_version":  "16.0.0-1ubuntu0.4+esm2"
        },
        {
            "binary_name":  "python-twisted-mail",
            "binary_version":  "16.0.0-1ubuntu0.4+esm2"
        },
        {
            "binary_name":  "python-twisted-names",
            "binary_version":  "16.0.0-1ubuntu0.4+esm2"
        },
        {
            "binary_name":  "python-twisted-news",
            "binary_version":  "16.0.0-1ubuntu0.4+esm2"
        },
        {
            "binary_name":  "python-twisted-runner",
            "binary_version":  "16.0.0-1ubuntu0.4+esm2"
        },
        {
            "binary_name":  "python-twisted-web",
            "binary_version":  "16.0.0-1ubuntu0.4+esm2"
        },
        {
            "binary_name":  "python-twisted-words",
            "binary_version":  "16.0.0-1ubuntu0.4+esm2"
        },
        {
            "binary_name":  "python3-twisted",
            "binary_version":  "16.0.0-1ubuntu0.4+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115778.json"
Ubuntu:Pro:18.04:LTS
twisted

Package

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

Affected ranges

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

Affected versions

16.*
16.6.0-2ubuntu3
17.*
17.9.0-1
17.9.0-2
17.9.0-2ubuntu0.1
17.9.0-2ubuntu0.3
17.9.0-2ubuntu0.3+esm1
17.9.0-2ubuntu0.3+esm2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "python-twisted",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python-twisted-bin",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python-twisted-conch",
            "binary_version":  "1:17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python-twisted-core",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python-twisted-mail",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python-twisted-names",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python-twisted-news",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python-twisted-runner",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python-twisted-web",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python-twisted-words",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python3-twisted",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        },
        {
            "binary_name":  "python3-twisted-bin",
            "binary_version":  "17.9.0-2ubuntu0.3+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115778.json"