---
id: "CVE-2026-110183"
kind: "vulnerability"
aliases: ["CVE-2026-110183"]
title: "PostgreSQL Anonymizer: original data statistics leak through pg_stats after masking"
severity: "medium"
cvss: 4.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["data-privacy", "database", "package", "postgresql"]
not_affected_if: ["extension-not-installed", "fixed-version", "no-static-masking"]
published_at: "2026-10-28T18:17:05+00:00"
first_seen_at: "2026-10-28T18:34:32+00:00"
updated_at: "2026-10-28T18:35:13+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110183", "first_seen_at": "2026-10-28T18:34:32+00:00"}]
---

# PostgreSQL Anonymizer: original data statistics leak through pg_stats after masking

PostgreSQL Anonymizer's static masking leaves statistics about the original data visible in pg_stats until ANALYZE runs on the table, either manually or through autovacuum. An attacker with read access to pg_stats can infer properties of the unmasked values.

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

## How to check

- Run `SELECT extversion FROM pg_extension WHERE extname = 'anon';` in each database and compare against the fixed version.
- Check whether static masking is used on tables, for example with `SELECT * FROM anon.pg_static_masking` or the `anon.anonymize_table` workflow, per the project docs.

## Fix

- Upgrade PostgreSQL Anonymizer to `3.3.0` or later.
- Run `ANALYZE` on statically masked tables after upgrading so pg_stats reflects masked data.

## Timeline

- 2026-10-28T18:34:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-110183

## From the sources

PostgreSQL Anonymizer contains a vulnerability related to static masking and statistics persistence. Statistics pertaining to the original data remain visible in pg_stats until an ANALYZE operation is performed on the table, either manually or by autovacuum. This issue is fixed 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_