---
id: "CVE-2026-105613"
kind: "vulnerability"
aliases: ["CVE-2026-105613"]
title: "PostgreSQL Anonymizer: range dummy functions allow unbounded memory use"
severity: "medium"
cvss: 4.7
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["database", "package", "postgres-extension", "postgresql", "self-hosted"]
not_affected_if: ["extension-not-installed", "patched-3.3.0-or-later"]
published_at: "2026-10-28T18:17:03+00:00"
first_seen_at: "2026-10-28T18:34:32+00:00"
updated_at: "2026-10-28T18:35:12+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105613", "first_seen_at": "2026-10-28T18:34:32+00:00"}]
---

# PostgreSQL Anonymizer: range dummy functions allow unbounded memory use

PostgreSQL Anonymizer's range-based dummy data functions do not limit the size of the range they generate. A caller can make a database backend allocate excessive memory, which the operating system may kill, forcing a cluster-wide crash recovery.

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

## How to check

- Check the installed extension version in PostgreSQL with `SELECT extversion FROM pg_extension WHERE extname = 'anon';`
- Check whether the anon extension is loaded at all with `SELECT * FROM pg_available_extensions WHERE name = 'anon';`

## Fix

- Upgrade PostgreSQL Anonymizer to `3.3.0` or later
- Re-run `ALTER EXTENSION anon UPDATE;` in each database where the extension is installed

## Timeline

- 2026-10-28T18:34:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-105613

## From the sources

PostgreSQL Anonymizer's range-based dummy functions dont constraint the range size. This vulnerability can be exploited to exhaust the memory of a backend and OOM-kill it (when ovecommit is on), which results in a cluster-wide crash recovery. The problem is resolved in PostgreSQL Anonymizer 3.3.0 and later versions.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_