# CVE-2026-28214

> Vulnerability · severity: **MEDIUM** (CVSS 6.5).

## 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.

## Key facts

- **CVE ID:** CVE-2026-28214
- **Published:** 2026-04-17
- **CVSS severity:** MEDIUM
- **CVSS base score:** 6.5
- **CWE codes:** CWE-190, CWE-835

## Affected products

- `firebirdsql:firebird`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-28214

## Citation

> AI Analytics. CVE-2026-28214. Retrieved 2026-07-29 from https://api.ai-analytics.org/cve/CVE-2026-28214. Derived from NIST NVD. Licensed CC0.

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