CVE-2026-50045

Name	CVE-2026-50045
Description	In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a single client query for a deeply nested name under a DNSSEC-signed parent can cause Unbound to send more upstream packets per client query than the configured 'max-global-quota'. This effectively bypasses a security configuration that limits upstream amplification traffic.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
unbound (PTS)	bullseye	1.13.1-1+deb11u2	vulnerable
	bullseye (security)	1.13.1-1+deb11u7	vulnerable
	bookworm	1.17.1-2+deb12u4	vulnerable
	bookworm (security)	1.17.1-2+deb12u3	vulnerable
	trixie (security), trixie	1.22.0-2+deb13u3	vulnerable
	forky, sid	1.26.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
unbound	source	(unstable)	1.25.2-1

https://community.nlnetlabs.nl/t/unbound-1-25-2-released/3430