CVE-2026-28214
Fixed in a distro release EPSS 1%CVSS 6.0
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.
Products: firebirdsql firebird
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | firebird3.0 | no fix |
| Debian 13 | firebird3.0 | no fix |
| Debian 13 | firebird4.0 | no fix |
| Debian 14 | firebird3.0 | 3.0.14.ds7-1 |
| Debian 14 | firebird4.0 | 4.0.7.3271.ds6-1 |
| Ubuntu 18.04 LTS | firebird3.0 | no fix |
| Ubuntu 20.04 LTS | firebird3.0 | no fix |
| Ubuntu 22.04 LTS | firebird3.0 | no fix |
| Ubuntu 24.04 LTS | firebird3.0 | no fix |
| Ubuntu 25.10 | firebird3.0 | no fix |
| Ubuntu 25.10 | firebird4.0 | no fix |
| Ubuntu 26.04 LTS | firebird3.0 | no fix |
| Ubuntu 26.04 LTS | firebird4.0 | no fix |
| Ubuntu 26.10 | firebird3.0 | no fix |
| Ubuntu 26.10 | firebird4.0 | no fix |