Vulnerability Description
pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, create_partition_time() reads the writable part_config.time_encoder text value and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with the documented partman_user INSERT and UPDATE privileges can store SQL rather than a function name. When pg_partman_bgw later creates a child partition for a text- or UUID-keyed set, the worker executes the stored SQL with pg_partman_bgw.role privileges, which default to PostgreSQL superuser. The persistent configuration row can repeatedly restore elevated access on later maintenance ticks, and successful exploitation can permit database-wide compromise and operating-system command execution as the PostgreSQL service account. This issue is fixed in version 5.5.0.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b16
- https://github.com/pgpartman/pg_partman/releases/tag/v5.5.0
- https://github.com/pgpartman/pg_partman/security/advisories/GHSA-742w-3j7c-qwvp
FAQ
What is CVE-2026-61781?
CVE-2026-61781 is a vulnerability with a CVSS score of 9.9 (CRITICAL). pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, create_partition_time() reads the writable part_config.time_encoder text value and interpolates it w...
How severe is CVE-2026-61781?
CVE-2026-61781 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-61781?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.