CVE-2026-18408 in PostgreSQL 18.*

Untrusted data inclusion in pg_dump in PostgreSQL allows a malicious superuser of the origin server to inject arbitrary code for restore-time execution as the client operating system account running psql to restore the dump, via psql \restrict meta-command input expansion. The fix for CVE-2025-8714 introduced \restrict and \unrestrict to block this attack, but \unrestrict itself was sufficient for an attack. pg_dumpall is also affected. pg_restore is affected when used to generate a plain-for

Severity

High 8.8

Exploitation

0% chance of exploit
in the next 30 days

Fix

Update to 18.5

Where

Workstation tool

How it matched

Version line match

First seen

2026-11-05 01:13:58 UTC

Source

https://nvd.nist.gov/vuln/detail/CVE-2026-18408