Vulnerability CVE-2026-28214: Information
Description
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.
Severity: MEDIUM (6.0)
Vector: CVSS: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
Severity: MEDIUM (6.5)
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published: April 17, 2026
Modified: April 24, 2026
Fixed packages
Package name | Branch | Fixed in version | Version from repository | Errata ID | Task # | State |
|---|---|---|---|---|---|---|
| firebird | sisyphus | 5.0.4-alt1 | 5.0.4-alt1 | ALT-PU-2026-7100-2 | 417095 | Fixed |
| firebird | sisyphus_loongarch64 | 5.0.4-alt1 | 5.0.4-alt1 | ALT-PU-2026-7495-1 | - | Fixed |
| firebird | p11 | 5.0.4-alt1 | 5.0.4-alt1 | ALT-PU-2026-7136-2 | 417164 | Fixed |
References to Advisories, Solutions, and Tools
Hyperlink | Resource |
|---|---|
| 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-7cq5-994r-jhrf |
|
| BDU:2026-05720 |