CVE-2026-16239 in PostgreSQL 18.*

Type confusion in PostgreSQL "portal"/cursor lifecycle allows a user to execute arbitrary code as the operating system user running the database, via re-creation of a cursor or other portal with different types. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

Severity

High 8.8

Exploitation

1% 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-2026-16239