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CVE-2026-61821

pg_partman authorization bypass to move child tables between schemas during retention

8.5 HighFix available

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, drop_partition_id() and drop_partition_time() use part_config.retention_schema as the target for ALTER TABLE SET SCHEMA and accept any nonempty schema name. A role with partman_user access can select a target schema where the role lacks the normal CREATE privilege, and the background worker performs the relocation with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, bypassing the authorization check that a normal ALTER TABLE SET SCHEMA operation would enforce. This permits unauthorized relocation of retained child tables between schemas. This issue is fixed in version 5.5.0.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
Low
Availability
None

Exploit likelihood

0.38%Up 0.1 points since Sep 19, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.5

pg_partman authorization bypass to move child tables between schemas during retention

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, drop_partition_id() and drop_partition_time() use part_config.retention_schema as the target for ALTER TABLE SET SCHEMA and accept any nonempty schema name. A role with partman_user access can select a target schema where the role lacks the normal CREATE privilege, and the background worker performs the relocation with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, bypassing the authorization check that a normal ALTER TABLE SET SCHEMA operation would enforce. This permits unauthorized relocation of retained child tables between schemas. This issue is fixed in version 5.5.0.

Record
CVE-2026-61821
CVSS 3.1
8.5 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Weakness
CWE-862
Updated
2026-11-02
EUVDEUVD-2026-83425 8.5

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, drop_partition_id() and drop_partition_time() use part_config.retention_schema as the target for ALTER TABLE SET SCHEMA and accept any nonempty schema name. A role with partman_user access can select a target schema where the role lacks the normal CREATE privilege, and the background worker performs the relocation with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, bypassing the authorization check that a normal ALTER TABLE SET SCHEMA operation would enforce. This permits unauthorized relocation of retained child tables between schemas. This issue is fixed in version 5.5.0.

Record
EUVD-2026-83425
CVSS 3.1
8.5 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
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, drop_partition_id() and drop_partition_time() use part_config.retention_schema as the target for ALTER TABLE SET SCHEMA and accept any nonempty schema name. A role with partman_user access can select a target schema where the role lacks the normal CREATE privilege, and the background worker performs the relocation with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, bypassing the authorization check that a normal ALTER TABLE SET SCHEMA operation would enforce. This permits unauthorized relocation of retained child tables between schemas. This issue is fixed in version 5.5.0.

Record
CVE-2026-61821
CVSS 3.1
8.5 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Weakness
CWE-862
Updated
2026-11-02
OSV 8.5

pg_partman authorization bypass to move child tables between schemas during retention

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, drop_partition_id() and drop_partition_time() use part_config.retention_schema as the target for ALTER TABLE SET SCHEMA and accept any nonempty schema name. A role with partman_user access can select a target schema where the role lacks the normal CREATE privilege, and the background worker performs the relocation with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, bypassing the authorization check that a normal ALTER TABLE SET SCHEMA operation would enforce. This permits unauthorized relocation of retained child tables between schemas. This issue is fixed in version 5.5.0.

Record
CVE-2026-61821
CVSS 3.1
8.5 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Weakness
CWE-862
Updated
2026-11-02
OSVDEBIAN-CVE-2026-61821 8.5

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, drop_partition_id() and drop_partition_time() use part_config.retention_schema as the target for ALTER TABLE SET SCHEMA and accept any nonempty schema name. A role with partman_user access can select a target schema where the role lacks the normal CREATE privilege, and the background worker performs the relocation with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, bypassing the authorization check that a normal ALTER TABLE SET SCHEMA operation would enforce. This permits unauthorized relocation of retained child tables between schemas. This issue is fixed in version 5.5.0.

Record
DEBIAN-CVE-2026-61821
CVSS 3.1
8.5 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2026-61821 8.5

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, drop_partition_id() and drop_partition_time() use part_config.retention_schema as the target for ALTER TABLE SET SCHEMA and accept any nonempty schema name. A role with partman_user access can select a target schema where the role lacks the normal CREATE privilege, and the background worker performs the relocation with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, bypassing the authorization check that a normal ALTER TABLE SET SCHEMA operation would enforce. This permits unauthorized relocation of retained child tables between schemas. This issue is fixed in version 5.5.0.

Record
UBUNTU-CVE-2026-61821
CVSS 3.1
8.5 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
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-2026-61821 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 0.38%, the 32nd percentile. Fixed in pg-partman 5.5.0-1.

References

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