Vulnerability Report

CVE-2026-28224

Title: Firebird Unauthenticated Null Pointer Dereference DoS

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2026-28224.

CWE Category CWE-476

Published Date Apr 17, 2026

Modified Date Apr 24, 2026

Exploit Status Not Found

Score 8.2 CVSS v3.1

Exploit Probability (EPSS)

0.59%

Vulnerability Summary

CVE-2026-28224: 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.

Impacted Vendors

firebirdsql 1

firebird 1

Reference Links

https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14 https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7 https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4 https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.2

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns