High severity · published Apr 17, 2026
CVE-2026-28212
Firebird has potential server crash via null pointer dereference when processing op_slice packet
7.5
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
firebird · FirebirdSQL
< 3.0.14; >= 4.0.0, < 4.0.7; >= 5.0.0, < 5.0.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28212
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28212
Release Notes
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
Exploit
https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-9884-9qm3-hqch
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