Vulnerability CVE-2026-28224: Information

Description

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an op_crypt_key_callback packet without prior authentication, the port_server_crypt_callback handler is not initialized, resulting in a null pointer dereference and server crash. An unauthenticated attacker who knows only the server's IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Severity: HIGH (8.2)

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-28224

Published: April 17, 2026

Modified: April 24, 2026

Error type identifier: CWE-476

Fixed packages

Package name	Branch	Fixed in version	Version from repository	Errata ID	Task #	State
firebird	sisyphus	5.0.4-alt1	5.0.4-alt1	ALT-PU-2026-7100-2	417095	Fixed
firebird	sisyphus_loongarch64	5.0.4-alt1	5.0.4-alt1	ALT-PU-2026-7495-1	-	Fixed
firebird	p11	5.0.4-alt1	5.0.4-alt1	ALT-PU-2026-7136-2	417164	Fixed

References to Advisories, Solutions, and Tools

Hyperlink	Resource
https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14	Release Notes
https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7	Release Notes
https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4	Release Notes
https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95	Exploit Vendor Advisory
BDU:2026-05711

Affected configurations:
1. cpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*
  End excluding
  3.0.14
  cpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*
  Start including
  4.0.0
  End excluding
  4.0.7
  cpe:2.3:a:firebirdsql:firebird:*:*:*:*:*:*:*:*
  Start including
  5.0.0
  End excluding
  5.0.4

Version: v26.2.2