DEBIAN-CVE-2026-19538

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Source
https://security-tracker.debian.org/tracker/CVE-2026-19538
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19538.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-19538
Upstream
Published
2026-08-26T09:16:46Z
Modified
2026-09-09T09:00:08Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:12 / nsd

Package

Name
nsd
Purl
pkg:deb/debian/nsd?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.6.1-1
4.7.0-1
4.8.0-1
4.9.1-1
4.10.1~rc2-1
4.10.1~rc2-2
4.10.1-1
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~rc1-1
4.15.0-1
4.15.1-1
4.15.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19538.json"

Debian:13 / nsd

Package

Name
nsd
Purl
pkg:deb/debian/nsd?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
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~rc1-1
4.15.0-1
4.15.1-1
4.15.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19538.json"

Debian:14 / nsd

Package

Name
nsd
Purl
pkg:deb/debian/nsd?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.15.1-1

Affected versions

4.*
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~rc1-1
4.15.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19538.json"