CVE-2026-104055: Canonical PostgreSQL-Operator

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

The postgresql-operator charm runs a Prometheus postgres_exporter to collect database metrics using a dedicated "monitoring" PostgreSQL user. On database connection errors, the exporter writes the monitoring user's password in cleartext to its logs. Any actor able to read those logs can recover the password, which grants read-only pg_monitor access to PostgreSQL. This is fixed in the dev track (14/edge) in revisions 1189 (arm64) and 1190 (amd64), and in the stable track (14/stable) in revisions 1216 (arm64) and 1217 (amd64).

Affected products

• Canonical PostgreSQL-Operator: before 1189 (fixed in 1189); before 1190 (fixed in 1190); before 1216 (fixed in 1216); before 1217 (fixed in 1217)

Published 2026-10-02. Last modified 2026-10-06.