---
title: "CVE-2026-120057: psqlODBC - Buffer Overflow"
description: "psqlODBC < 18.00.0006 contains a buffer overflow caused by copying large-object read replies without buffer size validation, letting man-in-the-middle or untrusted servers overwrite adjacent memory, exploit requires fetching any large-object column."
url: https://panop.io/threat-heartbeat/CVE-2026-120057/
---

# CVE-2026-120057 psqlODBC - Buffer Overflow

psqlODBC < 18.00.0006 contains a buffer overflow caused by copying large-object read replies without buffer size validation, letting man-in-the-middle or untrusted servers overwrite adjacent memory, exploit requires fetching any large-object column.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-120057)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution, Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

2 November 2026

Updated

3 November 2026

Weakness

[CWE-120](https://cwe.mitre.org/data/definitions/120.html)

## Vendor fix

Update to version 18.00.0006 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-120057](https://nvd.nist.gov/vuln/detail/CVE-2026-120057)
- [https://github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-qhmr-5339-q33r](https://github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-qhmr-5339-q33r)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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