CVE-2026-6473

What it is

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.

Exploit odds

1.0% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-05-14 14:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-08-25 13:19 UTC Last updatedMost recent change to the record

Details

Published

2026-05-14 14:16 UTC

Last modified

2026-08-25 13:19 UTC

Exploit probability

1.0% · EPSS, next 30 days

Weakness

CWE-190 · Integer overflow

Record status

Modified

Affected

• PostgreSQL < 14.23
• PostgreSQL < 15.18
• PostgreSQL < 16.14
• PostgreSQL < 17.10
• PostgreSQL < 18.4

Attack profile CVSS 3.1 · 8.8

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High