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.
History

Fri, 17 Apr 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Firebirdsql
Firebirdsql firebird
Vendors & Products Firebirdsql
Firebirdsql firebird

Fri, 17 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 17 Apr 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title Firebird Null Pointer Dereference via CryptCallback causes DOS
Weaknesses CWE-476
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-17T19:31:38.952Z

Reserved: 2026-02-25T15:28:40.650Z

Link: CVE-2026-28224

cve-icon Vulnrichment

Updated: 2026-04-17T19:31:27.860Z

cve-icon NVD

Status : Received

Published: 2026-04-17T19:16:35.983

Modified: 2026-04-17T20:16:32.460

Link: CVE-2026-28224

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-17T20:30:15Z