CVE-2026-28212

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

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-26)

CWE

CWE-476

Published

2026-04-17

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• firebirdsql:firebird

References

• 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-9884-9qm3-hqch

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