Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M
CVE-2026-61818pg_partman SQL injection in undo partition time encoder
High 8.5
In plain English
A high-severity SQL injection in pg_partman from pgpartman. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | pg-partman | no fix listed | DEBIAN-CVE-2026-61818 |
| Debian:13 | pg-partman | no fix listed | DEBIAN-CVE-2026-61818 |
| Debian:14 | pg-partman | 5.5.0-1 | DEBIAN-CVE-2026-61818 |
| Ubuntu:22.04:LTS | pg-partman | no fix listed | UBUNTU-CVE-2026-61818 |
| Ubuntu:24.04:LTS | pg-partman | no fix listed | UBUNTU-CVE-2026-61818 |
| Ubuntu:26.04:LTS | pg-partman | no fix listed | UBUNTU-CVE-2026-61818 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| pgpartman | pg_partman | < 5.5.0 |
Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H