---
id: CVE-2026-120061
title: psqlODBC ODBC escape parser stack buffer overflow
summary: >-
  The psqlODBC parser for ODBC escape sequences in application SQL text writes
  the argument offsets of a {fn} escape into a fixed 16-entry stack array
  without a bound and does not initialize the array. An escape with too many
  arguments ove…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-121
  - CWE-193
  - CWE-457
vendor: PostgreSQL
product: psqlODBC
affected:
  - psqlODBC < 18.00.0006
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-02T19:34:51.857010Z'
published: '2026-11-02'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T19:35:04.484Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120061'
references:
  - url: >-
      https://github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-hfm6-qfx8-v4xq
tags:
  - cve.org
epss: 0.00342
epssPercentile: 0.27875
ingestedAt: '2026-11-05T19:30:42.801Z'
---

## Overview

The psqlODBC parser for ODBC escape sequences in application SQL text writes the argument offsets of a {fn} escape into a fixed 16-entry stack array without a bound and does not initialize the array. An escape with too many arguments overflows the stack, and a reference to an unsupplied argument copies arbitrary bytes into the query. The copy of a {d}, {t}, {ts}, or {escape} body also writes one byte past a 128-byte stack buffer. An application that forwards untrusted SQL text to the driver exposes its process to memory corruption. Versions before psqlODBC 18.00.0006 are affected.

## Affected

- `psqlODBC < 18.00.0006`

## Remediation

Upgrade to psqlODBC 18.00.0006 or later. The argument offset array is initialized and bounded, and the escape body copy reserves room for the terminator.

### Workarounds

Do not pass SQL text from untrusted sources to the driver, or reject text containing ODBC escape sequences ({fn ...}, {d ...}, {t ...}, {ts ...}, {escape ...}) before it reaches the driver.