Type Confusion Vulnerability in PostgreSQL Refint Module
CVE-2026-14671

8.8HIGH

Key Information:

Vendor

PostgreSQL
Status
Postgresql
Vendor
CVE Published:
13 August 2026

What is CVE-2026-14671?

A type confusion vulnerability in the 'refint' module of PostgreSQL can allow an object creator to execute arbitrary code as the operating system user running the database. This issue was initially reported as a non-security bug, with fixes implemented in the database's git repository under the subject 'refint: Remove plan cache.' Affected versions include those prior to PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24, making it essential for users to upgrade to mitigate potential risks.

Affected Version(s)

PostgreSQL 18 < 18.5

PostgreSQL 17 < 17.11

PostgreSQL 16 < 16.15

References

https://www.postgresql.org/support/security/CVE-2026-14671/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

The PostgreSQL project thanks Hcamael for reporting this problem.
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