{"id":"CVE-2026-61818","aliases":["DEBIAN-CVE-2026-61818","EUVD-2026-83427","GHSA-fm3m-9fh7-mqfc","UBUNTU-CVE-2026-61818"],"status":"published","title":"pg_partman SQL injection in undo partition time encoder","description":"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.","severity":{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00513,"percentile":0.44058,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-89"],"published":"2026-09-18T19:47:30Z","modified":"2026-10-28T02:30:50Z","fixes":[{"ecosystem":"Debian:14","package":"pg-partman","fixed_in":["5.5.0-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"pg-partman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.7.2-1","4.7.3-1","4.7.4-2","5.0.0-1","5.0.0-2","5.0.1-1","5.1.0-1","5.1.0-2","5.2.0-1","5.2.1-1","5.2.2-1","5.2.4-1","5.3.0-1","5.3.0~rc1-1","5.3.1-1","5.3.1-2","5.4.0-1","5.4.1-1","5.4.2-1","5.4.3-1","5.5.0-1"]},{"source":"osv","ecosystem":"Debian:13","package":"pg-partman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.4-1","5.3.0-1","5.3.0~rc1-1","5.3.1-1","5.3.1-2","5.4.0-1","5.4.1-1","5.4.2-1","5.4.3-1","5.5.0-1"]},{"source":"osv","ecosystem":"Debian:14","package":"pg-partman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.5.0-1"}]}],"versions":["5.2.4-1","5.3.0-1","5.3.0~rc1-1","5.3.1-1","5.3.1-2","5.4.0-1","5.4.1-1","5.4.2-1","5.4.3-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"pg-partman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.2-1","2.2.2-2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"pg-partman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.3-1","3.1.0-1","3.1.1-1","3.1.2-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"pg-partman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.0-1","4.2.0-1","4.2.2-1","4.3.0-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"pg-partman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.5.1-1","4.6.0-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"pg-partman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.7.3-1","5.0.0-2","5.0.1-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"pg-partman","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.4-1","5.3.1-2","5.4.0-1","5.4.1-1"]}],"products":[{"vendor":"pgpartman","product":"pg_partman"}],"references":[{"url":"https://github.com/pgpartman/pg_partman/security/advisories/GHSA-fm3m-9fh7-mqfc","tags":["x_refsource_CONFIRM","advisory","report"]},{"url":"https://github.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b165854361","tags":["x_refsource_MISC","fix","report"]},{"url":"https://github.com/pgpartman/pg_partman/releases/tag/v5.5.0","tags":["x_refsource_MISC","web","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61818.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61818","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-61818","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-61818","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-61818","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-61818","title":"pg_partman SQL injection in undo partition time encoder","description":"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.","status":"published","published":"2026-09-18T19:47:30.083Z","modified":"2026-09-19T14:11:36.597Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-89"],"updated_at":"2026-11-02T14:19:53.115938Z"}],"euvd":[{"id":"EUVD-2026-83427","description":"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.","status":"published","published":"2026-09-18T19:47:30Z","modified":"2026-09-19T14:11:36Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T17:28:06.658724Z"}],"nvd":[{"id":"CVE-2026-61818","description":"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.","status":"published","published":"2026-09-18T20:17:19.78Z","modified":"2026-09-24T21:22:19.873Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-89"],"updated_at":"2026-11-02T14:12:50.043898Z"}],"osv":[{"id":"CVE-2026-61818","title":"pg_partman SQL injection in undo partition time encoder","description":"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.","status":"published","published":"2026-09-18T19:47:30.083Z","modified":"2026-10-28T02:30:50.938669923Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-89"],"updated_at":"2026-11-02T15:45:12.933503Z"},{"id":"DEBIAN-CVE-2026-61818","description":"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.","status":"published","published":"2026-09-18T20:17:19.78Z","modified":"2026-09-25T08:47:27.725253343Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:57.932517Z"},{"id":"UBUNTU-CVE-2026-61818","description":"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.","status":"published","published":"2026-09-18T20:17:00Z","modified":"2026-09-23T23:31:26Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:43.630667Z"}]}}