CVE-2026-28214
Firebird server hangs when using specific clumplet on batch creation
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-190 CWE-835 |
| Vendor | firebirdsql |
| Product | firebird |
| Published | Apr 17, 2026 |
Stay Ahead of the Next One
Get instant alerts for firebirdsql firebird
Be the first to know when new unknown vulnerabilities affecting firebirdsql firebird are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
FirebirdSQL / firebird
>= 3.0.0, < 3.0.14 >= 4.0.0, < 4.0.7 >= 5.0.0, < 5.0.4
References
github.com: https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7cq5-994r-jhrf github.com: https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14 github.com: https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7 github.com: https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4