pgpartman pg_partman up to 5.4.x time_dncoder sql injection

Summaryinfo

A vulnerability was found in pgpartman pg_partman up to 5.4.x and classified as critical. The affected element is the function run_maintenance/show_partitions/show_partition_info/undo_partition/partition_data_time. The manipulation of the argument time_dncoder results in sql injection. This vulnerability is cataloged as CVE-2026-61817. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in pgpartman pg_partman up to 5.4.x. Affected is the function run_maintenance/show_partitions/show_partition_info/undo_partition/partition_data_time. The manipulation of the argument time_dncoder with an unknown input leads to a sql injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, run_maintenance(), show_partitions(), show_partition_info(), undo_partition(), and partition_data_time() interpolate the writable part_config.time_dncoder text value without identifier quoting into dynamic SQL. A role with the documented partman_user privileges can store SQL rather than a decoder function name. When an affected operation later uses the poisoned value, including pg_partman_bgw maintenance for a text- or UUID-keyed set, the SQL executes with the operation's privileges, which can be the default PostgreSQL superuser background-worker role. The persistent row can restore elevated access on later 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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-61817 since 07/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1505 by the MITRE ATT&CK project.

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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