CVEvulnerability

CVE-2026-40342

9.9 CRITICAL Published 2026-04-17 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-04-17
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.9 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-22, CWE-427, CWE-73, CWE-94

Description

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the external engine plugin loader concatenates a user-supplied engine name into a filesystem path without filtering path separators or .. components. An authenticated user with CREATE FUNCTION privileges can use a crafted ENGINE name to load an arbitrary shared library from anywhere on the filesystem via path traversal. The library's initialization code executes immediately during loading, before Firebird validates the module, achieving code execution as the server's OS account. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Affected configurations

• firebirdsql firebird (< 3.0.14) • firebirdsql firebird (>= 4.0.0 < 4.0.7) • firebirdsql firebird (>= 5.0.0 < 5.0.4)

Related

Weakness · CWE (4)

  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness
  • CWE-427 Uncontrolled Search Path Element weakness
  • CWE-73 External Control of File Name or Path weakness
  • CWE-94 Improper Control of Generation of Code weakness

References