DEBIAN-CVE-2026-19538
The BLOCKED access control list items that are evaluated to deny access on the the proxy protocol port can be bypassed completely when connecting over TCP or TLS and sending the query twice on connection that is kept open.
DEBIAN-CVE-2026-19538
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-2026-19538
nsd
Source reference: /affected/0/package/name
- Affected versions
- 4.10.1-1
Source reference:
/affected/0/versions4.10.1~rc2-1Source reference:
/affected/0/versions4.10.1~rc2-2Source reference:
/affected/0/versions4.11.0-1Source reference:
/affected/0/versions4.11.1-1Source reference:
/affected/0/versions4.12.0-1Source reference:
/affected/0/versions4.12.0-2Source reference:
/affected/0/versions4.13.0-1Source reference:
/affected/0/versions4.13.0-2Source reference:
/affected/0/versions4.13.0-3Source reference:
/affected/0/versions4.13.0-4Source reference:
/affected/0/versions4.13.0-5Source reference:
/affected/0/versions4.13.0-6Source reference:
/affected/0/versions4.14.0-1Source reference:
/affected/0/versions4.14.1-1Source reference:
/affected/0/versions4.14.2-1Source reference:
/affected/0/versions4.14.3-1Source reference:
/affected/0/versions4.15.0-1Source reference:
/affected/0/versions4.15.0~rc1-1Source reference:
/affected/0/versions4.15.1-1Source reference:
/affected/0/versions4.15.2-1Source reference:
/affected/0/versions4.6.1-1Source reference:
/affected/0/versions4.7.0-1Source reference:
/affected/0/versions4.8.0-1Source reference:
/affected/0/versions4.9.1-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
nsd
Source reference: /affected/1/package/name
- Affected versions
- 4.12.0-1
Source reference:
/affected/1/versions4.12.0-2Source reference:
/affected/1/versions4.13.0-1Source reference:
/affected/1/versions4.13.0-2Source reference:
/affected/1/versions4.13.0-3Source reference:
/affected/1/versions4.13.0-4Source reference:
/affected/1/versions4.13.0-5Source reference:
/affected/1/versions4.13.0-6Source reference:
/affected/1/versions4.14.0-1Source reference:
/affected/1/versions4.14.1-1Source reference:
/affected/1/versions4.14.2-1Source reference:
/affected/1/versions4.14.3-1Source reference:
/affected/1/versions4.15.0-1Source reference:
/affected/1/versions4.15.0~rc1-1Source reference:
/affected/1/versions4.15.1-1Source reference:
/affected/1/versions4.15.2-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
nsd
Source reference: /affected/2/package/name
- Affected versions
- 4.12.0-1
Source reference:
/affected/2/versions4.12.0-2Source reference:
/affected/2/versions4.13.0-1Source reference:
/affected/2/versions4.13.0-2Source reference:
/affected/2/versions4.13.0-3Source reference:
/affected/2/versions4.13.0-4Source reference:
/affected/2/versions4.13.0-5Source reference:
/affected/2/versions4.13.0-6Source reference:
/affected/2/versions4.14.0-1Source reference:
/affected/2/versions4.14.1-1Source reference:
/affected/2/versions4.14.2-1Source reference:
/affected/2/versions4.14.3-1Source reference:
/affected/2/versions4.15.0-1Source reference:
/affected/2/versions4.15.0~rc1-1Source reference:
/affected/2/versions - Fixed versions
- 4.15.1-1
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": "nsd",
"purl": "pkg:deb/debian/nsd?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"4.10.1-1",
"4.10.1~rc2-1",
"4.10.1~rc2-2",
"4.11.0-1",
"4.11.1-1",
"4.12.0-1",
"4.12.0-2",
"4.13.0-1",
"4.13.0-2",
"4.13.0-3",
"4.13.0-4",
"4.13.0-5",
"4.13.0-6",
"4.14.0-1",
"4.14.1-1",
"4.14.2-1",
"4.14.3-1",
"4.15.0-1",
"4.15.0~rc1-1",
"4.15.1-1",
"4.15.2-1",
"4.6.1-1",
"4.7.0-1",
"4.8.0-1",
"4.9.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19538.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "nsd",
"purl": "pkg:deb/debian/nsd?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"4.12.0-1",
"4.12.0-2",
"4.13.0-1",
"4.13.0-2",
"4.13.0-3",
"4.13.0-4",
"4.13.0-5",
"4.13.0-6",
"4.14.0-1",
"4.14.1-1",
"4.14.2-1",
"4.14.3-1",
"4.15.0-1",
"4.15.0~rc1-1",
"4.15.1-1",
"4.15.2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19538.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.15.1-1"
}
]
}
],
"package": {
"name": "nsd",
"purl": "pkg:deb/debian/nsd?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"4.12.0-1",
"4.12.0-2",
"4.13.0-1",
"4.13.0-2",
"4.13.0-3",
"4.13.0-4",
"4.13.0-5",
"4.13.0-6",
"4.14.0-1",
"4.14.1-1",
"4.14.2-1",
"4.14.3-1",
"4.15.0-1",
"4.15.0~rc1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19538.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55557 · Revision 1
- Added to Heist Feed
- Publisher date