CVE-2026-104055 Monitoring-user password logged in cleartext by postgres_exporter in postgresql VM charm
Attackers with log access can recover cleartext monitoring passwords, gaining read-only database access in PostgreSQL operator charms.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-104055?
CVE-2026-104055 is a medium-severity vulnerability in Canonical postgresql-operator, published on 2 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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).
Weakness: CWE-532
Which versions are affected by CVE-2026-104055?
How do I fix CVE-2026-104055?
No fix has been published for CVE-2026-104055 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-104055 being exploited?
There is no known exploitation of CVE-2026-104055 in the wild and no public exploit code.
Sources
Also known as GHSA-3533-w4pf-7x2r, GHSA-rcx7-7rh5-r542.