Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M
CVE-2026-61820pg_partman privilege escalation via SQL injection when inheriting template properties
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 0.7% (higher than 54% 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, inherit_template_properties() manually surrounds primary-key column names from pg_attribute.attname with double quotes without escaping embedded double-quote characters. A partman_user who owns a template table can create a crafted column name that breaks out of the generated ALTER TABLE ADD PRIMARY KEY identifier when the background worker applies the key to a child partition. The generated SQL then executes with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, permitting database-wide compromise and operating-system command execution as the PostgreSQL service account. The crafted catalog identifier persists until removed and can trigger again during later partition creation. 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-2026-61820 |
| Debian:13 | pg-partman | no fix listed | DEBIAN-CVE-2026-61820 |
| Debian:14 | pg-partman | 5.5.0-1 | DEBIAN-CVE-2026-61820 |
| Ubuntu:22.04:LTS | pg-partman | no fix listed | UBUNTU-CVE-2026-61820 |
| Ubuntu:24.04:LTS | pg-partman | no fix listed | UBUNTU-CVE-2026-61820 |
| Ubuntu:26.04:LTS | pg-partman | no fix listed | UBUNTU-CVE-2026-61820 |
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