CVE-2026-6473

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.

What this means for your business

It affects Postgresql. It matters if your company, or a supplier that handles your data, runs it.
An attacker can use it remotely, over a network, with an ordinary user login, and without anyone at your company clicking anything.
FIRST's prediction model gives it a 1% chance of attack attempts being seen in the next 30 days, ranking above 61% of all known flaws.

What to do

1Check whether your company or your suppliers run Postgresql, and which version. The affected versions are listed further down this page.
2If you do, apply the vendor's fix. A patch or vendor advisory has been published.

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Scoring

CVSS: 8.8 (v3.1)
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-190
Assigned by: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

Dates

Published: 2026-05-14
Last modified: 2026-08-25
Sources: NVD

Affected products

Postgresql Postgresql- 14.23, 15.0 - 15.18, 16.0 - 16.14, 17.0 - 17.10, 18.0 - 18.4

As listed in the NVD configuration data. Not a statement about your estate.