cbcvebase.
CVE-2026-28214
published 2026-04-17

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…

PriorityP337medium6.5CVSS 3.1
AVNACLPRLUINSUCNINAH
EPSS
1.13%
62.4th percentile
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.

Affected

6 ranges
VendorProductVersion rangeFixed in
firebirdsqlfirebird< 3.0.143.0.14
firebirdsqlfirebird——
firebirdsqlfirebird——
firebirdsqlfirebird——
firebirdsqlfirebird>= 4.0.0 < 4.0.74.0.7
firebirdsqlfirebird>= 5.0.0 < 5.0.45.0.4

CVSS provenance

nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvdv4.06.0MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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