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CVE-2026-40342

CRITICAL

9.9

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.

CVE Details

CVSS v3.1 Score9.9

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published4/17/2026

Last Modified4/20/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

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

References

https://github.com/FirebirdSQL/firebird/releases/tag/v3.0.14(security-advisories@github.com)

https://github.com/FirebirdSQL/firebird/releases/tag/v4.0.7(security-advisories@github.com)

https://github.com/FirebirdSQL/firebird/releases/tag/v5.0.4(security-advisories@github.com)

https://github.com/FirebirdSQL/firebird/security/advisories/GHSA-7pxc-h3rv-r257(security-advisories@github.com)

IOC Correlations

No correlations recorded

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