CVE-2026-28224

Name: CVE-2026-28224
Creator: NVD / NIST
Published: 2026-04-17T19:16:35.983+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.2/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2026-28224 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. 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. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.2/10

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

EPSS Probability

0.46%

36.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Firebirdsql	Firebird	< 3.0.14
Firebirdsql	Firebird	>= 4.0.0, < 4.0.7
Firebirdsql	Firebird	>= 5.0.0, < 5.0.4

References

https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14Release Notes
https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7Release Notes
https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4Release Notes
https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95Exploit, Vendor Advisory
https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95Exploit, Vendor Advisory

Timeline

Published: Apr 17, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-28224?

How severe is CVE-2026-28224?

CVE-2026-28224 has a CVSS score of 8.2/10 (HIGH severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2026-28224?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-28224?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST