CVE-2026-28212: Firebirdsql Firebird

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Firebird is an open-source relational database management system. In versions prior to 6.0.0, 5.0.4, 4.0.7 and 3.0.14, when processing an op_slice network packet, the server passes an unprepared structure containing a null pointer to the SDL_info() function, resulting in a null pointer dereference and server crash. An unauthenticated attacker can trigger this by sending a crafted packet to the server port. This issue has been fixed in versions 6.0.0, 5.0.4, 4.0.7 and 3.0.14.

Affected products

• Firebirdsql Firebird: 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.