# 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…

Source: https://junglewise.ai/threats/cve-2026-28214-firebird-is-an-open-source-relational-database-management-system  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-17  
License: CC BY 4.0 with a link back

CVE-2026-28214 · Severity: medium · CVSS 6.5 · Published 2026-04-17

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.

Technologies: [Firebirdsql Firebird](https://junglewise.ai/threats/technologies/firebird). Vendors: [Firebirdsql](https://junglewise.ai/threats/vendors/firebirdsql).

## Quick answers

**Is CVE-2026-28214 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-28214 being exploited in the wild.

**How severe is CVE-2026-28214?** Medium severity, with a CVSS score of 6.5, published 17 April 2026.

**Which products and versions are affected?** Firebirdsql Firebird. The advisory does not name versions.

**Is there a fix for CVE-2026-28214?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-28214?** Check whether you run Firebirdsql Firebird. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Firebirdsql Firebird

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