CVE-2026-28212: 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…
CVE-2026-28212 · Severity: high · CVSS 7.5 · Published 2026-04-17
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-28212 being exploited in the wild.
How severe is CVE-2026-28212?
High severity, with a CVSS score of 7.5, published 17 April 2026.
Which products and versions are affected?
Firebirdsql Firebird. The advisory does not name versions.
Is there a fix for CVE-2026-28212?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-28212?
Check whether you run Firebirdsql Firebird. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.