CVE-Katalog

CVE-2026-83813

twisted affected and fixed versions

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.names.dns.DNSDatagramProtocol accepts a UDP DNS response for a pending query when its 16-bit transaction ID matches but does not verify that the response came from the queried host and port. An attacker able to deliver a packet to the resolver's listening port with the correct transaction ID can inject a forged answer. The standard twisted.names.client.Resolver uses a new random source port for each query, increasing off-path attack complexity, while applications that reuse a DNSDatagramProtocol instance expose only the transaction-ID search space after the first query. A successful forgery can redirect hostname resolution and enable mail interception, server-side request forgery, or man-in-the-middle positioning. This issue is fixed in version 26.10.0rc1.

Schweregrad: Low · CVSS 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Published: Oct 23, 2026, 8:21:54 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.11% · Oct 29, 2026

Projects and upstream resources

[twisted][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	twisted	Not reported	AffectedDistribution reports no fix	[CVE-2026-83813]
Debiantrixie	twisted	`24.11.0-1`	Affected	[CVE-2026-83813]
Debiansid	twisted	Not reported	AffectedDistribution reports no fix	[CVE-2026-83813]
Debiansid	twisted	`26.4.0-6`	Affected	[CVE-2026-83813]
Ubuntupro	twisted	`16.6.0-2ubuntu3`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-2ubuntu0.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-2ubuntu0.3`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-2ubuntu0.3+esm1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-2ubuntu0.3+esm2`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Debianforky	twisted	Not reported	AffectedDistribution reports no fix	[CVE-2026-83813]

Showing 12 observations. All 49 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	twisted	Not reported	AffectedDistribution reports no fix	[CVE-2026-83813]
Debianbookworm	twisted	`22.4.0-4+deb12u1`	Affected	[CVE-2026-83813]
Debianbookworm-security	twisted	`22.4.0-4+deb12u1`	Affected	[CVE-2026-83813]
Debianforky	twisted	Not reported	AffectedDistribution reports no fix	[CVE-2026-83813]
Debianforky	twisted	`26.4.0-6`	Affected	[CVE-2026-83813]
Debiansid	twisted	Not reported	AffectedDistribution reports no fix	[CVE-2026-83813]
Debiansid	twisted	`26.4.0-6`	Affected	[CVE-2026-83813]
Debiantrixie	twisted	Not reported	AffectedDistribution reports no fix	[CVE-2026-83813]
Debiantrixie	twisted	`24.11.0-1`	Affected	[CVE-2026-83813]
Ubuntu20.04	twisted	`18.9.0-11`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-11ubuntu0.20.04.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-11ubuntu0.20.04.2`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-11ubuntu0.20.04.3`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-11ubuntu0.20.04.4`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-11ubuntu0.20.04.5`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-3ubuntu1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-5`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-6`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-6build1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-6ubuntu1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu20.04	twisted	`18.9.0-8`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu22.04	twisted	`20.3.0-7ubuntu1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu22.04	twisted	`20.3.0-7ubuntu3`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu22.04	twisted	`22.1.0-2ubuntu2`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu22.04	twisted	`22.1.0-2ubuntu2.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu22.04	twisted	`22.1.0-2ubuntu2.3`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu22.04	twisted	`22.1.0-2ubuntu2.4`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu22.04	twisted	`22.1.0-2ubuntu2.5`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu22.04	twisted	`22.1.0-2ubuntu2.6`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu22.04	twisted	`22.1.0-2ubuntu2.7`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu24.04	twisted	`22.4.0-4`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu24.04	twisted	`22.4.0-4ubuntu1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu24.04	twisted	`23.10.0-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu24.04	twisted	`24.3.0-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu24.04	twisted	`24.3.0-1ubuntu0.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu24.04	twisted	`24.3.0-1ubuntu0.2`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu26.04	twisted	`24.11.0-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu26.04	twisted	`25.5.0-4`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu26.04	twisted	`25.5.0-5`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu26.04	twisted	`25.5.0-5ubuntu0.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu26.10	twisted	`25.5.0-5`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntu26.10	twisted	`26.4.0-4`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`16.6.0-2ubuntu3`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-2ubuntu0.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-2ubuntu0.3`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-2ubuntu0.3+esm1`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC
Ubuntupro	twisted	`17.9.0-2ubuntu0.3+esm2`	UnknownSource applicability is not established	[UBUNTU-CVE-2026-83813]Oct 27, 2026, 4:17:59 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "twisted",
      "status": "vulnerable",
      "release": "sid",
      "version": "26.4.0-6"
    },
    {
      "name": "twisted",
      "status": "vulnerable",
      "release": "forky",
      "version": "26.4.0-6"
    },
    {
      "name": "twisted",
      "status": "vulnerable",
      "release": "trixie",
      "version": "24.11.0-1"
    },
    {
      "name": "twisted",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "22.4.0-4+deb12u1"
    },
    {
      "name": "twisted",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "22.4.0-4+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1151938,
      "name": "twisted",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1151938,
      "name": "twisted",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1151938,
      "name": "twisted",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1151938,
      "name": "twisted",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "twisted",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "16.6.0-2ubuntu3",
        "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": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-83813",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2026-83813",
      "provider_updated_at": "2026-10-27T04:17:59.158607707Z",
      "applicability_unknown": true
    },
    {
      "name": "twisted",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "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": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-83813",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2026-83813",
      "provider_updated_at": "2026-10-27T04:17:59.158607707Z",
      "applicability_unknown": true
    },
    {
      "name": "twisted",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "20.3.0-7ubuntu1",
        "20.3.0-7ubuntu3",
        "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": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-83813",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2026-83813",
      "provider_updated_at": "2026-10-27T04:17:59.158607707Z",
      "applicability_unknown": true
    },
    {
      "name": "twisted",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "22.4.0-4",
        "22.4.0-4ubuntu1",
        "23.10.0-2",
        "24.3.0-1",
        "24.3.0-1ubuntu0.1",
        "24.3.0-1ubuntu0.2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-83813",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2026-83813",
      "provider_updated_at": "2026-10-27T04:17:59.158607707Z",
      "applicability_unknown": true
    },
    {
      "name": "twisted",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.10",
      "versions": [
        "25.5.0-5",
        "26.4.0-4"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-83813",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2026-83813",
      "provider_updated_at": "2026-10-27T04:17:59.158607707Z",
      "applicability_unknown": true
    },
    {
      "name": "twisted",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.04",
      "versions": [
        "24.11.0-1",
        "25.5.0-4",
        "25.5.0-5",
        "25.5.0-5ubuntu0.1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-83813",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2026-83813",
      "provider_updated_at": "2026-10-27T04:17:59.158607707Z",
      "applicability_unknown": true
    }
  ]
}

[Debian bug #1151938]

Publisher notes

[trixie] twisted: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[python3-twisted]Unbekannt
Quellpaket: [twisted]
Details (4)
- 22.4.0-4+deb12u1 · all · bookworm
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14
- 22.4.0-4+deb12u1 · all · bookworm
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14
- 22.4.0-4+deb12u1 · all · bookworm-security
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14
- 22.4.0-4+deb12u1 · all · bookworm-security
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14
[twisted-doc]Unbekannt
Quellpaket: [twisted]
Details (4)
- 22.4.0-4+deb12u1 · all · bookworm
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14
- 22.4.0-4+deb12u1 · all · bookworm
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14
- 22.4.0-4+deb12u1 · all · bookworm-security
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14
- 22.4.0-4+deb12u1 · all · bookworm-security
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14

[Debian 13 (Trixie)]

[python3-twisted]Unbekannt
Quellpaket: [twisted]
Details (2)
- 24.11.0-1 · all · trixie
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14
- 24.11.0-1 · all · trixie
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14
[twisted-doc]Unbekannt
Quellpaket: [twisted]
Details (2)
- 24.11.0-1 · all · trixie
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14
- 24.11.0-1 · all · trixie
  Unbekannt
  Version impact unknown
  dsa · twisted · debian · bookworm; pypi · twisted · debian · 12; pypi · twisted · debian · 13; pypi · twisted · debian · 14

Beobachtet: Oct 29, 2026, 8:07:39 AM UTC

Referenzen

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]