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CVE-2026-61818

pg_partman SQL injection in undo partition time encoder

8.5 HighFix available

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

0.51%Up 0.1 points since Sep 19, 2026
90%50%10%1%

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 HighCVSS: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 HighCVSS: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 HighCVSS: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 HighCVSS: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 HighCVSS: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 HighCVSS: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

Affected packages
PackageAffectedFixed
pg-partman
Debian: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 less
5.0.1-15.1.0-15.1.0-25.2.0-15.2.1-15.2.2-15.2.4-15.3.0-15.3.0~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-partman
Debian: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 less
5.4.0-15.4.1-15.4.2-15.4.3-15.5.0-1
None known
pg-partman
Debian: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 less
5.4.0-15.4.1-15.4.2-15.4.3-1
5.5.0-1
pg-partman
Ubuntu:16.04:LTS
All versions, plus listed versions
2.2.2-12.2.2-2
None known
pg-partman
Ubuntu:18.04:LTS
All versions, plus listed versions
2.6.3-13.1.0-13.1.1-13.1.2-1
None known
pg-partman
Ubuntu:20.04:LTS
All versions, plus listed versions
4.0.0-14.2.0-14.2.2-14.3.0-1
None known
pg-partman
Ubuntu:22.04:LTS
All versions, plus listed versions
4.5.1-14.6.0-1
None known
pg-partman
Ubuntu:24.04:LTS
All versions, plus listed versions
4.7.3-15.0.0-25.0.1-1
None known
pg-partman
Ubuntu:26.04:LTS
All versions, plus listed versions
5.2.4-15.3.1-25.4.0-15.4.1-1
None known

History

History
RecordedChangedSources
first indexedCVE 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

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