CVE-2026-33337
HIGH
MEDIUM
Priority: 0.04
BB Relevance:
75/100
Published: 2026-04-17
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
None
I:
None
A:
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, when deserializing a slice packet, the xdr_datum() function does not validate that a cstring length conforms to the slice descriptor bounds, allowing a cstring longer than the allocated buffer to overflow it. An unauthenticated attacker can exploit this by sending a crafted packet to the server, potentially causing a crash or other security impact. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.
Affected Software (3)
| Vendor | Product | Version |
|---|---|---|
| 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 & Advisories (4)
Release Notes
Release Notes
Release Notes
Exploit
Vendor Advisory