CVE-2026-28212
High
Description
Firebird is an open-source relational database management system. In versions prior to 6.0.0, 5.0.4, 4.0.7 and 3.0.14, when processing an op_slice network packet, the server passes an unprepared structure containing a null pointer to the SDL_info() function, resulting in a null pointer dereference and server crash. An unauthenticated attacker can trigger this by sending a crafted packet to the server port. This issue has been fixed in versions 6.0.0, 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-476NULL pointer dereference
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 | 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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