pgpartman pg_partman up to 5.4.x Background Worker create_partition_time time_encoder sql injection

Summaryinfo

A vulnerability, which was classified as problematic, has been found in pgpartman pg_partman up to 5.4.x. This impacts the function create_partition_time of the component Background Worker. This manipulation of the argument time_encoder causes sql injection. The identification of this vulnerability is CVE-2026-61781. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in pgpartman pg_partman up to 5.4.x. It has been declared as problematic. Affected by this vulnerability is the function create_partition_time of the component Background Worker. The manipulation of the argument time_encoder with an unknown input leads to a sql injection vulnerability. The CWE definition for the vulnerability is CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-61781 since 07/10/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

Upgrading to version 5.5.0 eliminates this vulnerability.

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Productinfo

Vendor

• pgpartman

Name

• pg_partman

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4

Website

• Product: https://github.com/pgpartman/pg_partman/

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