Vulnerability Description
pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, inherit_template_properties() manually surrounds primary-key column names from pg_attribute.attname with double quotes without escaping embedded double-quote characters. A partman_user who owns a template table can create a crafted column name that breaks out of the generated ALTER TABLE ADD PRIMARY KEY identifier when the background worker applies the key to a child partition. The generated SQL then executes with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, permitting database-wide compromise and operating-system command execution as the PostgreSQL service account. The crafted catalog identifier persists until removed and can trigger again during later partition creation. This issue is fixed in version 5.5.0.
CVSS Score
HIGH
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-xqxh-6hh3-974m
FAQ
What is CVE-2026-61820?
CVE-2026-61820 is a vulnerability with a CVSS score of 8.5 (HIGH). pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, inherit_template_properties() manually surrounds primary-key column names from pg_attribute.attname ...
How severe is CVE-2026-61820?
CVE-2026-61820 has been rated HIGH with a CVSS base score of 8.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-61820?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.