This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-14681 →

UBUNTU-CVE-2026-14681

Improper enforcement of message integrity in PostgreSQL GSSAPI support allows a user to negotiate GSSAPI contrary to pg_hba.conf rules, via initial di...

Original description

The description as published by the source.

Improper enforcement of message integrity in PostgreSQL GSSAPI support allows a user to negotiate GSSAPI contrary to pg_hba.conf rules, via initial direct TLS connection. Despite a pg_hba.conf that appears to require GSSAPI, the connection may exchange data over TLS encryption alone. If the TLS settings are more permissive than the GSS settings, the connection may continue with lesser protection. Within major versions 17-18, minor versions before PostgreSQL 18.6 and 17.11 are affected. Versions before PostgreSQL 17 are unaffected.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Ubuntu:Pro:14.04:LTS postgresql-9.3

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Ubuntu:26.04:LTS postgresql-18

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"18.6-0ubuntu0.26.04.1"}]}]

References

advisory ubuntu.com
report ubuntu.com
report cve.org
report postgresql.org
report postgresql.org