{"id":"CVE-2026-61818","summary":"pg_partman SQL injection in undo partition time encoder","details":"pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, undo_partition() reads part_config.time_encoder as unrestricted text and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with partman_user access can store SQL rather than a function name, and the SQL executes with the privileges of the caller that invokes undo_partition(). The function is not part of the default background-worker path, which limits the automatic superuser escalation described by the related create-partition vulnerability, but a privileged caller can still have its available confidentiality, integrity, and availability permissions abused. This issue is fixed in version 5.5.0.","aliases":["GHSA-fm3m-9fh7-mqfc"],"modified":"2026-09-20T03:30:43.987763630Z","published":"2026-09-18T19:47:30.083Z","database_specific":{"cwe_ids":["CWE-89"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61818.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61818.json"},{"type":"FIX","url":"https://github.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b165854361"},{"type":"WEB","url":"https://github.com/pgpartman/pg_partman/releases/tag/v5.5.0"},{"type":"ADVISORY","url":"https://github.com/pgpartman/pg_partman/security/advisories/GHSA-fm3m-9fh7-mqfc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61818"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pgpartman/pg_partman","events":[{"introduced":"0"},{"fixed":"f7e83b9c441c7e97066d815bbe14e02a9dc5ff94"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"5.5.0"}]}}],"versions":["v5.4.3","v5.4.2","v5.4.1","v5.4.0","v5.3.1","v5.3.0","v5.3.0RC1","v5.2.4","v5.2.3","v5.2.2","v5.2.1","v5.2.0","v5.1.0","v5.0.1","v5.0.0","v4.7.1","v4.7.0","v4.6.2","v4.6.1","v4.6.0","v4.5.1","v4.5.0","v4.4.1","v4.4.0","v4.3.1","v4.3.0","v4.2.2","v4.2.1","v4.2.0","v4.1.0","v4.0.0","v3.2.1","v3.2.0","v3.1.3","v3.1.2","v3.1.1","v3.1.0","v3.0.2","v3.0.1","v2.6.4","v2.6.3","v2.6.2","v2.6.1","v2.6.0","v2.5.1","v2.5.0","v2.4.1","v2.4.0","v2.3.4","v2.3.3","v2.3.2","v2.3.1","v2.3.0","v2.2.3","v2.2.2","v2.2.1","v2.2.0","v2.1.0","v2.0.0","v1.8.7","v1.8.6","v1.8.5","v1.8.4","v1.8.3","v1.8.2","v1.8.1","v1.8.0","v1.7.2","v1.7.1","v1.7.0","v1.6.1","v1.6.0","v1.5.1","v1.5.0","v1.4.5","v1.4.4","v1.4.3","v1.4.1","v1.4.0","v1.3.0","v1.2.0","v1.1.0","v1.0.0","v0.4.2","v0.4.1","v0.4.0","v0.3.2","v0.3.1","v0.3.0","v0.2.0","v0.1.2","v0.1.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61818.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}