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CVE-2026-40342

Firebird: Path Traversal + Arbitrary File Write Leads to Remote Code Execution PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
FirebirdSQL / firebirdaffected < 3.0.14; affected >= 4.0.0, < 4.0.7; affected >= 5.0.0, < 5.0.4

CWE

CWE-22, CWE-427, CWE-73, CWE-94

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.