CVE-2026-14671

HIGH 8.8

PostgreSQL refint plan cache type confusion executes arbitrary code

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-843
Vendor	n/a
Product	postgresql
Ecosystems	Database
Industries	Technology
Published	Aug 13, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / PostgreSQL

18 < 18.5 17 < 17.11 16 < 16.15 15 < 15.19 0 < 14.24

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

The PostgreSQL project thanks Hcamael for reporting this problem.