CVE-2026-28224 Details
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.
A denial-of-service vulnerability has been identified in Firebird, an open-source relational database management system. This issue affects versions prior to 5.0.4, 4.0.7, and 3.0.14. The vulnerability arises when the server receives an 'op_crypt_key_callback' packet without prior authentication. In such cases, the 'port_server_crypt_callback' handler is not properly initialized, leading to a null pointer dereference and a server crash. An unauthenticated attacker who knows the server's IP and port can exploit this flaw to cause a crash.
Users can upgrade to Firebird versions 5.0.4, 4.0.7, or 3.0.14 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 17, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95 | CISA-ADP | ExploitVendor Advisory |
| https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14 | [email protected] | Release Notes |
| https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7 | [email protected] | Release Notes |
| https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4 | [email protected] | Release Notes |
| https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-xrcw-wpjx-pr95 | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| firebirdsql firebird | < 3.0.14 >= 4.0.0, < 4.0.7 >= 5.0.0, < 5.0.4 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 24, 2026 | Initial Analysis | [email protected] |
| Apr 17, 2026 | CVE Modified | CISA-ADP |
| Apr 17, 2026 | New CVE Received | [email protected] |