CVE-2026-6473

High

Description

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.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Postgresql

PublishedMay 14, 2026

First seenMay 14, 2026

Weakness typeCWE-190Integer overflow

How to fix

Update

postgresql postgresql14.23, 15.18, 16.14, 17.10, 18.4 or later

Vendor advisories

Affected products

Product	Affected versions	Fixed in
postgresql postgresql	v < 14.23, 15.0 ≤ v < 15.18, 16.0 ≤ v < 16.14, 17.0 ≤ v < 17.10, 18.0 ≤ v < 18.4	14.23, 15.18, 16.14, 17.10, 18.4

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