high7.5
CVE-2026-33337
Firebird is an open-source relational database management system.
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Firebirdsql | Firebird | from 3.0.0 before 3.0.14 from 4.0.0 before 4.0.7 from 5.0.0 before 5.0.4 |