AZL-113789: CVE-2026-14661 affecting package postgresql 16.15-1
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.
Affected Software
Event History
Frequently Asked Questions
Which deployments are affected outside PostgreSQL 18?
PostgreSQL versions before 18 are affected only when libpq version 18 or later is installed and used by the server. Within major version 18, releases before 18.7 are affected.
What access does an attacker need to trigger the denial of service?
The issue is reachable through PostgreSQL dblink and CREATE or ALTER SUBSCRIPTION, where a user can supply the sslkeylogfile connection parameter. The provided data does not specify the exact database privileges required to use those features.
What is the impact on the selected file?
The sslkeylogfile parameter appends NSS keylog-format data to a file chosen by the user, which can create a persistent denial of service. It cannot be used to append arbitrary bytes.