CRITICAL: CVE-2026-40342 (CVSS 9.9) — firebirdsql firebird

CVE: CVE-2026-40342

CVSS: 9.9 (3.1) — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Severity: CRITICAL

Status: Critical advisory

Affected

firebirdsql firebird

Summary

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.

Verified Sources

References

https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14
https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7
https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4
https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7pxc-h3rv-r257

_Validated by the Lyrie Threat Intelligence Pipeline — 3 independent sources confirmed before publication. No speculation._

Lyrie Verdict

A vulnerability of this severity is exactly what Lyrie's anti-rogue-AI defense is built for: continuous, autonomous monitoring that doesn't wait for human reaction time.

#firebirdsql #critical