UBUNTU-CVE-2026-115877

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Source
https://ubuntu.com/security/CVE-2026-115877
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115877.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-115877
Upstream
Published
2026-10-26T00:00:00Z
Modified
2026-10-27T04:16:52Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N 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.web.http.HTTPChannel.headerReceived rejects a NUL byte in an HTTP header value but accepts a bare carriage return or bare line feed. Because Twisted splits header lines only on CRLF, a hidden Content-Length header can remain folded into another value while a lenient front end treats the bare character as a line terminator. The resulting framing disagreement can smuggle a following request past front-end access controls, poison a shared connection or cache, and expose a later client to the wrong response. This issue is an incomplete-fix residual of earlier Twisted request-smuggling protections. 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-2026-115877.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-2026-115877.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-2026-115877.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-2026-115877.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-2026-115877.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-2026-115877.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-2026-115877.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-2026-115877.json"