Integer Wraparound Vulnerability in PostgreSQL Database Management System
CVE-2026-116328

8.8HIGH

Key Information:

Vendor

PostgreSQL
Status
Postgresql
Vendor
CVE Published:
12 November 2026

What is CVE-2026-116328?

An integer wraparound vulnerability exists in PostgreSQL's memory context management, enabling a database user to execute arbitrary code under the privileges of the operating system user running the database. This issue arises from the improper handling of memory allocation, specifically when freeing large allocations exceeding 1 GB. The vulnerability permits the reused memory blocks to be manipulated in a way that may lead to unauthorized code execution, affecting users running affected minor versions of PostgreSQL 16 through 18. It is crucial for users to update their installations to mitigate the risk associated with this vulnerability.

Affected Version(s)

PostgreSQL 18 < 18.7

PostgreSQL 17 < 17.12

PostgreSQL 16 < 16.16

References

https://www.postgresql.org/support/security/CVE-2026-116328/

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 Jayden Sarveshkumar for reporting this problem.
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