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

Published Aug 13, 2026
·
Updated

PostgreSQL refint plan cache type confusion executes arbitrary code

Other sources

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 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

— MITRE

Affected Software

7 affected componentsFixes available
PostgreSQL refint module><=14.23, ><=15.18, ><=16.14, ><=17.10, ><=18.4
PostgreSQL postgresql>=14.0<14.24
PostgreSQL postgresql>=15.0<15.19
PostgreSQL postgresql>=16.0<16.15
PostgreSQL postgresql>=17.0<17.11
PostgreSQL postgresql>=18.0<18.5
Microsoft azl3 postgresql 16.14-1<16.15-1
16.15-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 16.15-1
  2. Upgrade

    Upgrade PostgreSQL refint module to a version that resolves this vulnerability.

    Fixed in 18.6
  3. Upgrade

    Upgrade PostgreSQL refint module to a version that resolves this vulnerability.

    Fixed in 17.11
  4. Upgrade

    Upgrade PostgreSQL refint module to a version that resolves this vulnerability.

    Fixed in 16.15
  5. Upgrade

    Upgrade PostgreSQL refint module to a version that resolves this vulnerability.

    Fixed in 15.19
  6. Upgrade

    Upgrade PostgreSQL refint module 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
Data Sourced
via NVD·01:17 PM
DescriptionSeverityWeaknessAffected Software
Aug 15, 2026
Data Sourced
via Microsoft·02:36 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:36 AM
Affected Software
Updated
via Microsoft·02:36 AM
DescriptionSeverity

Frequently Asked Questions

1

What is the severity of CVE-2026-14671?

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

2

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.

3

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.

4

Who is affected by CVE-2026-14671?

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

5

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.

Company

Resources

Contact

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