CVE-2026-35215
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductFirebird
PublishedApr 17, 2026
First seenApr 17, 2026
Weakness typeCWE-369CWE-369
How to fix
Update
- firebirdsql firebird3.0.14, 4.0.7, 5.0.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| firebirdsql firebird | 3.0.0 ≤ v < 3.0.14, 4.0.0 ≤ v < 4.0.7, 5.0.0 ≤ v < 5.0.4 | 3.0.14, 4.0.7, 5.0.4 |
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