CVE-2026-14671: PostgreSQL refint plan cache type confusion executes arbitrary code

Published Aug 13, 2026

Updated

Type confusion in PostgreSQL module "refint" allows an object creator to execute arbitrary code as the operating system user running the database. The fix for this emerged as a non-security bug report, and the fix appear in the git repository with subject "refint: Remove plan cache.", without a CVE number. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

Affected Software

1 affected component

PostgreSQL refint module><=14.23, ><=15.18, ><=16.14, ><=17.10, ><=18.4

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 18.5
Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 17.11
Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.15
Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.19
Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 14.24

Event History

Aug 13, 2026

CVE Published

via MITRE·01:00 PM

Data Sourced

via MITRE·01:00 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2026-14671?

The severity of CVE-2026-14671 is rated as high, with a score of 8.8.

What vulnerability does CVE-2026-14671 expose in PostgreSQL?

CVE-2026-14671 exposes a type confusion issue in the PostgreSQL refint module that allows arbitrary code execution.

How do I fix CVE-2026-14671?

To fix CVE-2026-14671, update PostgreSQL to the latest version that includes the fix for the refint plan cache.

Who is affected by CVE-2026-14671?

Any user with the ability to create objects in PostgreSQL can be affected by CVE-2026-14671.

What are the potential consequences of exploiting CVE-2026-14671?

Exploiting CVE-2026-14671 could allow an attacker to execute arbitrary code with the same privileges as the PostgreSQL database user.

CVE-2026-14671: PostgreSQL refint plan cache type confusion executes arbitrary code

Affected Software

Remediation

Event History

Don't miss critical vulnerabilities

Frequently Asked Questions

What is the severity of CVE-2026-14671?

What vulnerability does CVE-2026-14671 expose in PostgreSQL?

How do I fix CVE-2026-14671?

Who is affected by CVE-2026-14671?

What are the potential consequences of exploiting CVE-2026-14671?

Company

Resources

Contact

Frequently Asked Questions

What is the severity of CVE-2026-14671?

What vulnerability does CVE-2026-14671 expose in PostgreSQL?

How do I fix CVE-2026-14671?

Who is affected by CVE-2026-14671?

What are the potential consequences of exploiting CVE-2026-14671?