CVE-2026-18447

PostgreSQL output parameter type confusion executes arbitrary code

Type confusion in PostgreSQL SQL-language functions allows an object creator to execute arbitrary code as the operating system user running the database, via an output parameter of type "any". Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

Version Information

Affected Version Fixed In Fix Published
18 18.7 2026-11-12
17 17.12 2026-11-12
16 16.16 2026-11-12
15 15.20 2026-11-12
14 14.25 2026-11-12

For more information about PostgreSQL versioning, please visit the versioning page.

CVSS 3.0

Overall Score 8.8
Component core server
Vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reporting Security Vulnerabilities

If you wish to report a new security vulnerability in PostgreSQL, please send an email to security@postgresql.org.

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