Integer Wraparound Vulnerability in PostgreSQL Database Software
CVE-2026-120139

8.8HIGH

Key Information:

Vendor

PostgreSQL
Status
Postgresql
Vendor
CVE Published:
12 November 2026

What is CVE-2026-120139?

An integer wraparound issue in PostgreSQL's in-memory tuple-size calculations allows attackers to execute arbitrary code with the privileges of the operating system user running the PostgreSQL database. This vulnerability arises from processing oversized tuple data, which can lead to unauthorized access and potential control over the system. It affects several versions of PostgreSQL and requires immediate attention to ensure the integrity and security of database systems.

Affected Version(s)

PostgreSQL 18 < 18.7

PostgreSQL 17 < 17.12

PostgreSQL 16 < 16.16

References

https://www.postgresql.org/support/security/CVE-2026-120139/

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 Hillai Ben Sasson, Jayden Sarveshkumar, and Mehmet Ince for reporting this problem.
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