---
id: "CVE-2026-116307"
page: "https://infrastack.ai/live/CVE-2026-116307"
kind: "vulnerability"
aliases: ["CVE-2026-116307"]
title: "PostgreSQL: plperl use-after-free lets a database object creator run OS code"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["database", "plperl", "postgresql", "runtime", "self-hosted"]
not_affected_if: ["patched-version", "plperl-not-installed", "restricted-object-creation"]
published_at: "2026-11-12T15:17:38+00:00"
first_seen_at: "2026-11-12T15:41:53+00:00"
updated_at: "2026-11-12T15:43:39+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116307", "first_seen_at": "2026-11-12T15:41:53+00:00"}]
exploit_sources: []
---

# PostgreSQL: plperl use-after-free lets a database object creator run OS code

Link for people: https://infrastack.ai/live/CVE-2026-116307 (this .md is for agents)

A use-after-free in PostgreSQL's plperl extension occurs when plperl is re-entered and a prepared query is freed while an outer call is still running it. A user who can create database objects can execute arbitrary code as the operating system user running the database.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `psql -c "SHOW server_version;"` and compare with the fixed versions below.
- Check whether the plperl extension is installed: `psql -c "SELECT extname FROM pg_extension WHERE extname = 'plperl';"`

## Fix

- PostgreSQL `18.7`
- PostgreSQL `17.12`
- PostgreSQL `16.16`
- PostgreSQL `15.20`
- PostgreSQL `14.25`

## Timeline

- 2026-11-12T15:41:53+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116307

## From the sources

Use after free in PostgreSQL plperl allows an object creator to execute arbitrary code as the operating system user running the database, via re-entering plperl and freeing a prepared query while an outer invocation is executing it.  Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

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