CVE-2025-65104 PUBLISHED

Firebird: Information leak vulnerability in firebird3 client when used with newer server

Assigner: GitHub_M
Reserved: 17.11.2025 Published: 17.04.2026 Updated: 17.04.2026

Firebird is an open-source relational database management system. In versions FB3 of the client library placed incorrect data length values into XSQLDA fields when communicating with FB4 or higher servers, resulting in an information leak. This issue is fixed by upgrading to the FB4 client or higher.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L
CVSS Score: 7.9

Attack Vector	Local	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	FirebirdSQL
Product	firebird
Versions	Version < 4.0.0 is affected

References

https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-mfpr-9886-xjhg
https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.0

Problem Types

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE