CVE-2026-19538

Name
CVE-2026-19538
Description
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
sep@nlnetlabs.nl https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-19538.txt

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:nlnetlabs:nsd:*:*:*:*:*:*:*:* nsd >= 4.8.0 < 4.15.1

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
nsd edge-main 4.15.1-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
nsd edge-main 4.15.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd edge-main 4.14.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd edge-main 4.14.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd edge-main 4.14.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd edge-main 4.14.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd edge-main 4.13.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd edge-main 4.12.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd edge-main 4.11.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd edge-main 4.11.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd edge-main 4.10.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd 3.24-main 4.14.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd 3.24-main 4.14.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd 3.23-main 4.13.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd 3.22-main 4.12.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd 3.21-main 4.11.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd 3.21-main 4.11.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd 3.21-main 4.10.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
nsd 3.20-main 4.9.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable