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CVE-2025-65104— Firebird: Information leak vulnerability in firebird3 client when used with newer server

Quick assessment

Affected
FirebirdSQL firebird
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Firebird是Firebird基金会的一套开源跨平台的提供多个ANSI SQL-92功能的关系型数据库管理系统。 Firebird FB3版本存在安全漏洞，该漏洞源于客户端库与FB4或更高版本服务器通信时数据长度值放置错误，可能导致信息泄露。

CVSS 7.9 · High EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2025-65104

Vulnerability Information
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Vulnerability Title
Firebird: Information leak vulnerability in firebird3 client when used with newer server
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Firebird 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Firebird是Firebird基金会的一套开源跨平台的提供多个ANSI SQL-92功能的关系型数据库管理系统。 Firebird FB3版本存在安全漏洞，该漏洞源于客户端库与FB4或更高版本服务器通信时数据长度值放置错误，可能导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FirebirdSQL firebird < 4.0.0 -

II. Public POCs for CVE-2025-65104

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III. Intelligence Information for CVE-2025-65104

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Same Patch Batch · FirebirdSQL · 2026-04-17 · 9 CVEs total

CVE-2026-40342 10.0 CRITICAL Firebird: Path Traversal + Arbitrary File Write Leads to Remote Code Execution
CVE-2026-27890 8.2 HIGH Firebird has Pre-Auth DOS when Processing Out of Order CNCT_specific_data Segments
CVE-2026-28224 8.2 HIGH Firebird Null Pointer Dereference via CryptCallback causes DOS
CVE-2026-35215 7.5 HIGH Firebird: DoS via malicious slice descriptor in slice packet
CVE-2026-34232 7.5 HIGH Firebird: DoS via `op_response` packet from client
CVE-2026-28212 7.5 HIGH Firebird has potential server crash via null pointer dereference when processing op_slice
CVE-2026-33337 7.5 HIGH Firebird has a buffer overflow when parsing corrupted slice packets
CVE-2026-28214 Firebird server hangs when using specific clumplet on batch creation

IV. Related Vulnerabilities

Same product: firebird
Same vendor: FirebirdSQL
Same weakness: CWE-200