CVE-2026-28214

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the ClumpletReader::getClumpletSize() function can overflow the totalLength value when parsing a Wide type clumplet, causing an infinite loop. An authenticated user with INSERT privileges on any table can exploit this via a crafted Batch Parameter Block to cause a denial of service against the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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-7cq5-994r-jhrf	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:firebirdsql:firebird::::::::
	cpe:2.3:a:firebirdsql:firebird::::::::
	cpe:2.3:a:firebirdsql:firebird::::::::

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) Firebird es un sistema de gestión de base de datos relacional de código abierto. En versiones anteriores a 5.0.4, 4.0.7 y 3.0.14, la función ClumpletReader::getClumpletSize() puede desbordar el valor totalLength al analizar un clumplet de tipo Wide, causando un bucle infinito. Un usuario autenticado con privilegios INSERT en cualquier tabla puede explotar esto a través de un Batch Parameter Block manipulado para causar una denegación de servicio contra el servidor. Este problema ha sido solucionado en las versiones 5.0.4, 4.0.7 y 3.0.14.

Information

Published : 2026-04-17 19:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-28214

Mitre link : CVE-2026-28214

CVE.ORG link : CVE-2026-28214

JSON object : View

Products Affected

firebirdsql

firebird

CWE

CWE-190

Integer Overflow or Wraparound

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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