CVE-2026-6472 — PostgreSQL CREATE TYPE does not check multirange schema CREATE privilege

Affected: PostgreSQL

Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to find user-defined types, including extension-defined types. That is to say, the victim will execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

USN-8294-1 — postgresql-14, postgresql-16, postgresql-17, postgresql-18 vulnerabilities

Affected: Ubuntu:22.04:LTS: postgresql-14, Ubuntu:24.04:LTS: postgresql-16, Ubuntu:25.10: postgresql-17, Ubuntu:26.04:LTS: postgresql-18

It was discovered that PostgreSQL did not correctly enforce authorization for CREATE TYPE. An attacker could possibly use this issue to execute arbitrary SQL functions. (CVE-2026-6472)

It was discovered that PostgreSQL incorrectly handled large user input in multiple server features. An attacker could possibly use this issue to cause PostgreSQL to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-6473)

It was discovered that PostgreSQL incorrectly handled format strings in the timeofday() function. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-6474)

It was discovered that PostgreSQL incorrectly followed symbolic links in pg_basebackup and pg_rewind. An attacker could possibly use this issue to overwrite local files and execute arbitrary code. (CVE-2026-6475)

It was discovered that PostgreSQL had an SQL injection vulnerability in pg_createsubscriber. An attacker could possibly use this issue to execute arbitrary SQL as a superuser. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-6476)

It was discovered that PostgreSQL used an unsafe libpq function in large object operations. An attacker could possibly use this issue to overwrite client memory and execute arbitrary code. (CVE-2026-6477)

It was discovered that PostgreSQL did not compare MD5-hashed passwords in constant time. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-6478)

It was discovered t…

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CVE-2026-6472 — PostgreSQL CREATE TYPE does not check multirange schema CREATE privilege

USN-8294-1 — postgresql-14, postgresql-16, postgresql-17, postgresql-18 vulnerabilities