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Vulnerability record · CVE-2026-28212 · published 17 April 2026

CVE-2026-28212: Firebirdsql firebird null pointer dereference vulnerability

Firebirdsql · Firebird

Firebird is an open-source relational database management system. In versions prior to 6.0.0, 5.0.4, 4.0.7 and 3.0.14, when processing an op_slice network packet, the server passes an unprepared structure containing a null pointer to the SDL_info() function, resulting in a null pointer dereference and server crash. An unauthenticated attacker can trigger this by sending a crafted packet to the server port. This issue has been fixed in versions 6.0.0, 5.0.4, 4.0.7 and 3.0.14.

7.5 CVSS 3.1 High EPSS 0.75% · top 46.9% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score
0.75%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

Firebird is an open-source relational database management system. In versions prior to 6.0.0, 5.0.4, 4.0.7 and 3.0.14, when processing an op_slice network packet, the server passes an unprepared structure containing a null pointer to the SDL_info() function, resulting in a null pointer dereference and server crash. An unauthenticated attacker can trigger this by sending a crafted packet to the server port. This issue has been fixed in versions 6.0.0, 5.0.4, 4.0.7 and 3.0.14.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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-9884-9qm3-hqch ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-28212), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.