DEBIAN-CVE-2026-42304
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.4.0rc2, the twisted.names module is vulnerable to a Denial of Service (DoS) attack via resource exhaustion during DNS name decompression. A remote, unauthenticated attacker can exploit this by sending a crafted TCP DNS packet containing deeply chained compression pointers. This flaw bypasses previous loop-prevention logic, causing the single-threaded Twisted reactor to hang while processing millions of recursive lookups, effectively freezing the server. This vulnerability is fixed in 26.4.0rc2.
DEBIAN-CVE-2026-42304
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-42304
twisted
Source reference: /affected/0/package/name
- Affected versions
- 22.4.0-4
Source reference:
/affected/0/versions22.4.0-4+deb12u1Source reference:
/affected/0/versions23.10.0-1Source reference:
/affected/0/versions23.10.0-2Source reference:
/affected/0/versions24.10.0-1Source reference:
/affected/0/versions24.10.0-2Source reference:
/affected/0/versions24.11.0-1Source reference:
/affected/0/versions24.3.0-1Source reference:
/affected/0/versions24.3.0-2Source reference:
/affected/0/versions24.3.0-3Source reference:
/affected/0/versions24.7.0-1Source reference:
/affected/0/versions24.7.0-2Source reference:
/affected/0/versions24.7.0-3Source reference:
/affected/0/versions25.5.0-1Source reference:
/affected/0/versions25.5.0-2Source reference:
/affected/0/versions25.5.0-3Source reference:
/affected/0/versions25.5.0-4Source reference:
/affected/0/versions25.5.0-5Source reference:
/affected/0/versions26.4.0-1Source reference:
/affected/0/versions26.4.0-2Source reference:
/affected/0/versions26.4.0-3Source reference:
/affected/0/versions26.4.0-4Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
twisted
Source reference: /affected/1/package/name
- Affected versions
- 24.11.0-1
Source reference:
/affected/1/versions25.5.0-1Source reference:
/affected/1/versions25.5.0-2Source reference:
/affected/1/versions25.5.0-3Source reference:
/affected/1/versions25.5.0-4Source reference:
/affected/1/versions25.5.0-5Source reference:
/affected/1/versions26.4.0-1Source reference:
/affected/1/versions26.4.0-2Source reference:
/affected/1/versions26.4.0-3Source reference:
/affected/1/versions26.4.0-4Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
twisted
Source reference: /affected/2/package/name
- Affected versions
- 24.11.0-1
Source reference:
/affected/2/versions25.5.0-1Source reference:
/affected/2/versions25.5.0-2Source reference:
/affected/2/versions25.5.0-3Source reference:
/affected/2/versions25.5.0-4Source reference:
/affected/2/versions25.5.0-5Source reference:
/affected/2/versions - Fixed versions
- 26.4.0-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "twisted",
"purl": "pkg:deb/debian/twisted?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"22.4.0-4",
"22.4.0-4+deb12u1",
"23.10.0-1",
"23.10.0-2",
"24.10.0-1",
"24.10.0-2",
"24.11.0-1",
"24.3.0-1",
"24.3.0-2",
"24.3.0-3",
"24.7.0-1",
"24.7.0-2",
"24.7.0-3",
"25.5.0-1",
"25.5.0-2",
"25.5.0-3",
"25.5.0-4",
"25.5.0-5",
"26.4.0-1",
"26.4.0-2",
"26.4.0-3",
"26.4.0-4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42304.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "twisted",
"purl": "pkg:deb/debian/twisted?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"24.11.0-1",
"25.5.0-1",
"25.5.0-2",
"25.5.0-3",
"25.5.0-4",
"25.5.0-5",
"26.4.0-1",
"26.4.0-2",
"26.4.0-3",
"26.4.0-4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42304.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "26.4.0-1"
}
]
}
],
"package": {
"name": "twisted",
"purl": "pkg:deb/debian/twisted?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"24.11.0-1",
"25.5.0-1",
"25.5.0-2",
"25.5.0-3",
"25.5.0-4",
"25.5.0-5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42304.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56996 · Revision 1
- Added to Heist Feed
- Publisher date