Use After Free Vulnerability in PostgreSQL Database Systems
CVE-2026-116332

8.8HIGH

Key Information:

Vendor

PostgreSQL
Status
Postgresql
Vendor
CVE Published:
12 November 2026

What is CVE-2026-116332?

A use after free vulnerability exists in PostgreSQL, which allows an object creator to execute arbitrary code on the operating system level. This vulnerability is triggered during the user-defined code execution phase when a portal that's being prepared is inadvertently closed. Consequently, versions of PostgreSQL including those before 18.7, 17.12, 16.16, 15.20, and 14.25 could be exploited, leading to severe security implications if left unaddressed.

Affected Version(s)

PostgreSQL 18 < 18.7

PostgreSQL 17 < 17.12

PostgreSQL 16 < 16.16

References

https://www.postgresql.org/support/security/CVE-2026-116332/

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 Tomas Vondra for reporting this problem.
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