CVE-2026-34232

Name	CVE-2026-34232
Description	Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the xdr_status_vector() function does not handle the isc_arg_cstring type when decoding an op_response packet, causing a server crash when one is encountered in the status vector. An unauthenticated attacker can exploit this by sending a crafted op_response packet to the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
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
firebird3.0 (PTS)	bullseye	3.0.7.33374.ds4-2	vulnerable
	bullseye (security)	3.0.7.33374.ds4-2+deb11u1	vulnerable
	bookworm	3.0.11.33637.ds4-2+deb12u1	vulnerable
	trixie	3.0.12.ds7-13+deb13u1	vulnerable
	forky, sid	3.0.13.ds7-2	vulnerable
firebird4.0 (PTS)	trixie (security), trixie	4.0.5.3140.ds6-17+deb13u1	vulnerable
	forky, sid	4.0.6.3221.ds6-2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
firebird3.0	source	(unstable)	(unfixed)
firebird4.0	source	(unstable)	(unfixed)

https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7jq3-6j3c-5cm2