CVE-2026-61818
pg_partman SQL injection in undo partition time encoder
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
8.5
pg_partman SQL injection in undo partition time encoder
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.
- Record
CVE-2026-61818- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-89
- Updated
- 2026-11-02
EUVDEUVD-2026-83427
8.5
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.
- Record
EUVD-2026-83427- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
NVD
8.5
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.
- Record
CVE-2026-61818- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-89
- Updated
- 2026-11-02
OSV
8.5
pg_partman SQL injection in undo partition time encoder
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.
- Record
CVE-2026-61818- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-89
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-61818
8.5
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.
- Record
DEBIAN-CVE-2026-61818- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-61818
8.5
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.
- Record
UBUNTU-CVE-2026-61818- CVSS 3.1
- 8.5 High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
pg-partmanDebian:12 |
All versions, plus listed versions 4.7.2-14.7.3-14.7.4-25.0.0-15.0.0-2 Show 16 moreShow less5.0.1-15.1.0-15.1.0-25.2.0-15.2.1-15.2.2-15.2.4-15.3.0-15.3.0~rc1-15.3.1-15.3.1-25.4.0-15.4.1-15.4.2-15.4.3-15.5.0-1 |
None known |
pg-partmanDebian:13 |
All versions, plus listed versions 5.2.4-15.3.0-15.3.0~rc1-15.3.1-15.3.1-2 Show 5 moreShow less5.4.0-15.4.1-15.4.2-15.4.3-15.5.0-1 |
None known |
pg-partmanDebian:14 |
before 5.5.0-1, plus listed versions 5.2.4-15.3.0-15.3.0~rc1-15.3.1-15.3.1-2 Show 4 moreShow less5.4.0-15.4.1-15.4.2-15.4.3-1 |
5.5.0-1 |
pg-partmanUbuntu:16.04:LTS |
All versions, plus listed versions 2.2.2-12.2.2-2 |
None known |
pg-partmanUbuntu:18.04:LTS |
All versions, plus listed versions 2.6.3-13.1.0-13.1.1-13.1.2-1 |
None known |
pg-partmanUbuntu:20.04:LTS |
All versions, plus listed versions 4.0.0-14.2.0-14.2.2-14.3.0-1 |
None known |
pg-partmanUbuntu:22.04:LTS |
All versions, plus listed versions 4.5.1-14.6.0-1 |
None known |
pg-partmanUbuntu:24.04:LTS |
All versions, plus listed versions 4.7.3-15.0.0-25.0.1-1 |
None known |
pg-partmanUbuntu:26.04:LTS |
All versions, plus listed versions 5.2.4-15.3.1-25.4.0-15.4.1-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-61818 is a high vulnerability (CVSS 8.5) in Pgpartman Pg Partman, published September 18, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.51%, the 43rd percentile. Fixed in pg-partman 5.5.0-1.
References
github.com/pgpartman/pg_partman/security/advisories/GHSA-fm3m-9fh7-mqfc
github.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b165854361
github.com/pgpartman/pg_partman/releases/tag/v5.5.0
github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61818.json
nvd.nist.gov/vuln/detail/CVE-2026-61818
security-tracker.debian.org/tracker/CVE-2026-61818
ubuntu.com/security/CVE-2026-61818
cve.org/CVERecord?id=CVE-2026-61818