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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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-2026-40342)

The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1868-1 advisory.

    This update for firebird fixes the following issues

    - CVE-2025-65104: Information leak vulnerability in firebird3 client when used with newer (>= 4) server     (bsc#1262330).
    - CVE-2026-27890: Pre-Auth DOS (bsc#1262328).
    - CVE-2026-28212: One packet DoS (bsc#1262329).
    - CVE-2026-28214: Server hangs when using specific clumplet on batch creation (bsc#1262327).
    - CVE-2026-28224: CryptCallback DOS (bsc#1262326).
    - CVE-2026-33337: Buffer overflow on parsing corrupted slice packet (bsc#1262325).
    - CVE-2026-34232: DoS via `op_response` packet from client (bsc#1262324).
    - CVE-2026-35215: DoS via malicious slice descriptor in slice packet (bsc#1262322).
    - CVE-2026-40342: Path traversal when declaring external routine (bsc#1262320).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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-2026-40342)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
477746	Echo: firebird4.0: security update to 4.0.5.3140.ds6-17+deb13u1+e1	Tenable Cloud Security	Echo Local Security Checks	Local	critical
477746	Echo: firebird4.0: security update to 4.0.5.3140.ds6-17+deb13u1+e1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	critical
315043	SUSE SLES15 Security Update : firebird (SUSE-SU-2026:1868-1)	Nessus	SuSE Local Security Checks	Local	medium
307396	Linux Distros Unpatched Vulnerability : CVE-2026-40342	Nessus	Misc.	Local	critical

Detections

Analytics

CVE-2026-40342

critical

Tenable Plugins

critical

critical

medium

critical