Bug 2459275 (CVE-2026-40342) - CVE-2026-40342 Firebird: Firebird: Arbitrary code execution via path traversal in external engine plugin loader
Summary: CVE-2026-40342 Firebird: Firebird: Arbitrary code execution via path traversa...
Keywords:
Status: NEW
Alias: CVE-2026-40342
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2459709 2459711 2459712 2459717
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-17 20:01 UTC by OSIDB Bzimport
Modified: 2026-04-20 12:58 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-04-17 20:01:47 UTC 
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.
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