CVE-2026-34232: Firebirdsql Firebird

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Firebirdsql Firebird: from 3.0.0, before 3.0.14 (fixed in 3.0.14); from 4.0.0, before 4.0.7 (fixed in 4.0.7); from 5.0.0, before 5.0.4 (fixed in 5.0.4)

Published 2026-04-17. Last modified 2026-06-17.