Bug 2540729

Summary: CVE-2026-61821 postgresql18-pg_partman: authorization bypass to move child tables between schemas during retention [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: postgresql18-pg_partmanAssignee: Pavol Sloboda <psloboda>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: epel10CC: db-sig, psloboda
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["a5eacf20-e9c6-4aaa-a9dc-fb172046b369"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2537861    

Description Guilherme de Almeida Suckevicz 2026-09-24 19:09:24 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, drop_partition_id() and drop_partition_time() use part_config.retention_schema as the target for ALTER TABLE SET SCHEMA and accept any nonempty schema name. A role with partman_user access can select a target schema where the role lacks the normal CREATE privilege, and the background worker performs the relocation with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, bypassing the authorization check that a normal ALTER TABLE SET SCHEMA operation would enforce. This permits unauthorized relocation of retained child tables between schemas. This issue is fixed in version 5.5.0.