4.3Medium
Postgresql Postgresql
CVE-2026-18024
Buffer over-read in PostgreSQL ascii() SQL function allows a user to disclose up to 3 bytes after the end of a specific allocation, via a crafted text value. This is the same class of defect that CVE-2026-2006 fixed, though this instance has less impact. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 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.
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.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 4.3 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N- Weakness
- CWE-126
- Assigned by
- f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Dates
- Published
- 2026-08-13
- Last modified
- 2026-08-29
- Sources
- NVD
Affected products
- Postgresql Postgresql14.0 - 14.24, 15.0 - 15.19, 16.0 - 16.15, 17.0 - 17.11, 18.0 - 18.5
As listed in the NVD configuration data. Not a statement about your estate.