---
id: CVE-2026-120059
title: psqlODBC uses a server-supplied column name as a format string
summary: >-
  For an updatable cursor over a table without OIDs that has an auto-increment
  int4 column, psqlODBC places that column's name, as reported by the server,
  into a printf-style format string. It later expands that string with one
  argument wh…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-134
vendor: PostgreSQL
product: psqlODBC
affected:
  - psqlODBC < 18.00.0006
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-02T19:34:10.365677Z'
published: '2026-11-02'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T19:34:22.575Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120059'
references:
  - url: >-
      https://github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-44rq-72jh-x2h8
tags:
  - cve.org
epss: 0.00261
epssPercentile: 0.17904
ingestedAt: '2026-11-05T19:30:42.801Z'
---

## Overview

For an updatable cursor over a table without OIDs that has an auto-increment int4 column, psqlODBC places that column's name, as reported by the server, into a printf-style format string. It later expands that string with one argument while it builds the WHERE clause of its positioned SELECT, UPDATE, and DELETE statements. A column name that contains format directives makes the driver read unrelated memory, which can crash the application or copy client memory into query text sent to the server. The name can come from a server not trusted under current SSL settings, or from any database user who can create a table that the application reads with an updatable cursor. Versions before psqlODBC 18.00.0006 are affected.

## Affected

- `psqlODBC < 18.00.0006`

## Remediation

Upgrade to psqlODBC 18.00.0006 or later. Each percent sign in the server-supplied column name is doubled before the name is placed in the format string.

### Workarounds

Set UpdatableCursors=0 in the connection string or DSN, or use read-only cursors (SQL_CONCUR_READ_ONLY).