PT-2026-33484 · Firebirdsql · Firebird

Published 2026-04-17 · Updated 2026-04-17 · CVE-2026-35215

NVD

CVSS v3.1

7.5

High

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Divide By Zero

Weakness Enumeration

CWE-369

Related Identifiers

CVE-2026-35215

Affected Products

Firebird

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-35215 · Security Note
• https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14 · Note
• https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4 · Note
• https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-g99w-prq5-29c6 · Note
• https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7 · Note