CVE-2026-16238 PUBLISHED

PostgreSQL type confusion in pg_restore_attribute_stats() executes arbitrary code

Assigner: PostgreSQL
Reserved: 20.07.2026 Published: 13.08.2026 Updated: 13.08.2026

Type confusion in PostgreSQL pg_restore_attribute_stats() allows an object creator to execute arbitrary code as the operating system user running the database, via conflation of range and multirange values. Within major version 18, minor versions before PostgreSQL 18.5 are affected. Versions before PostgreSQL 18 are unaffected.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	n/a
Product	PostgreSQL
Versions	Default: unaffected affected from 18 to 18.5 (excl.)

Affected Configurations

attacker has permission to create objects (temporary objects or non-temporary objects in at least one schema)

Workarounds

Revoke public EXECUTE permission on the function

Credits

The PostgreSQL project thanks Amy Burnett (OpenAI Codex Security) for reporting this problem.

References

https://www.postgresql.org/support/security/CVE-2026-16238/

Problem Types

Access of Resource Using Incompatible Type ('Type Confusion') CWE