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

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Summary

CVECVE-2025-65104
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-17 18:16:30 UTC
Updated2026-04-24 20:27:22 UTC
DescriptionFirebird 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.000280000 probability, percentile 0.079440000 (date 2026-04-27)

Problem Types: CWE-200 | NVD-CWE-noinfo | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1[email protected]Secondary7.9HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L
3.1CNADECLARED7.9HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Firebirdsql Firebird All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA FirebirdSQL Firebird affected < 4.0.0 Not specified

References

ReferenceSourceLinkTags
github.com/FirebirdSQL/firebird/releases/tag/v4.0.0 [email protected] github.com Product, Release Notes
github.com/FirebirdSQL/firebird/security/advisories/GHSA-mfpr-9886-xjhg [email protected] github.com Vendor Advisory
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