# CVE-2026-35215

## Summary

- **CVE ID:** CVE-2026-35215
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-369
- **Published:** Apr 17, 2026
- **Last Modified:** Apr 20, 2026

## 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 sdl_desc() function does not validate the length of a decoded SDL descriptor from a slice packet. A zero-length descriptor is later used to calculate the number of slice items, causing a division by zero. An unauthenticated attacker can exploit this by sending a crafted slice packet to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

## Affected Products

- FirebirdSQL — firebird (>= 3.0.0, < 3.0.14)
- FirebirdSQL — firebird (>= 4.0.0, < 4.0.7)
- FirebirdSQL — firebird (>= 5.0.0, < 5.0.4)

## References

- [CNA](https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-g99w-prq5-29c6)
- [CNA](https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14)
- [CNA](https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7)
- [CNA](https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.47%
- **EPSS Percentile:** 38.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._