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.
References (4)
Core 4
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-89mq-229g-x47p
X_Refsource_Misc x_refsource_misc
https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14
X_Refsource_Misc x_refsource_misc
https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7
X_Refsource_Misc x_refsource_misc
https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4
Scores
CVSS v3
7.5
EPSS
0.0054
EPSS Percentile
41.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-120
CWE-502
Status
published
Products (4)
firebirdsql/firebird
3.0.0 - 3.0.14
FirebirdSQL/firebird
>= 3.0.0, < 3.0.14
FirebirdSQL/firebird
>= 4.0.0, < 4.0.7
FirebirdSQL/firebird
>= 5.0.0, < 5.0.4
Published
Apr 17, 2026
Tracked Since
Apr 18, 2026