UBUNTU-CVE-2026-83813 (CVE-2026-83813)
Vulnerability from osv_ubuntu – Published: 2026-10-23 21:17 – Updated: 2026-10-28 17:43 – Source website
VLAI
Details
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.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "twisted",
"purl": "pkg:deb/ubuntu/twisted@13.2.0-1ubuntu1.2+esm3?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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": "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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "twisted",
"purl": "pkg:deb/ubuntu/twisted@16.0.0-1ubuntu0.4+esm2?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"15.2.1-1ubuntu2",
"15.5.0-1",
"15.5.0-2",
"15.5.0-2ubuntu1",
"15.5.0-4",
"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": "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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "twisted",
"purl": "pkg:deb/ubuntu/twisted@17.9.0-2ubuntu0.3+esm2?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"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_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"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "twisted",
"purl": "pkg:deb/ubuntu/twisted@18.9.0-11ubuntu0.20.04.5?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"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_specific": {
"binaries": [
{
"binary_name": "python3-twisted",
"binary_version": "22.1.0-2ubuntu2.7"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "twisted",
"purl": "pkg:deb/ubuntu/twisted@22.1.0-2ubuntu2.7?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"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_specific": {
"binaries": [
{
"binary_name": "python3-twisted",
"binary_version": "24.3.0-1ubuntu0.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "twisted",
"purl": "pkg:deb/ubuntu/twisted@24.3.0-1ubuntu0.2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"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_specific": {
"binaries": [
{
"binary_name": "python3-twisted",
"binary_version": "26.4.0-4"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.10",
"name": "twisted",
"purl": "pkg:deb/ubuntu/twisted@26.4.0-4?arch=source\u0026distro=stonking"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"25.5.0-5",
"26.4.0-4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-twisted",
"binary_version": "25.5.0-5ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "twisted",
"purl": "pkg:deb/ubuntu/twisted@25.5.0-5ubuntu0.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"24.11.0-1",
"25.5.0-4",
"25.5.0-5",
"25.5.0-5ubuntu0.1"
]
}
],
"aliases": [],
"details": "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\u0027s 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.",
"id": "UBUNTU-CVE-2026-83813",
"modified": "2026-10-28T17:43:53Z",
"published": "2026-10-23T21:17:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-83813"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-83813"
},
{
"type": "REPORT",
"url": "https://github.com/twisted/twisted/commit/b53e1c3477c209b5609a1c74cf9e48373b5879ac"
},
{
"type": "REPORT",
"url": "https://github.com/twisted/twisted/pull/12700"
},
{
"type": "REPORT",
"url": "https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1"
},
{
"type": "REPORT",
"url": "https://github.com/twisted/twisted/security/advisories/GHSA-jj36-9pvh-vj5r"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-83813"
]
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.