Bug 2572565 (CVE-2026-14661)

Summary: CVE-2026-14661 postgresql: postgresql: Persistent Denial of Service via arbitrary file append in sslkeylogfile parameter
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in PostgreSQL. An authenticated user can supply an arbitrary file path using the sslkeylogfile connection parameter in database features such as dblink or subscription management commands. By forcing the server to append cryptographic key log data to targeted system files, the user can corrupt critical files, resulting in a persistent Denial of Service (DoS).
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Description OSIDB Bzimport 2026-11-12 14:33:48 UTC 
External control of file name in PostgreSQL dblink and CREATE/ALTER SUBSCRIPTION allows a user to achieve persistent denial of service, via appending invalid data to a chosen file.  Specifically, the "sslkeylogfile" connection parameter appends data, in NSS keylog format, to a file of the user's choosing.  This "sslkeylogfile" mechanism cannot add arbitrary bytes.  Within major version 18, minor versions before PostgreSQL 18.7 are affected.  Versions before PostgreSQL 18 are also affected if libpq version 18 or later is installed and in use by the server.