CVE-2026-18024

Medium

Open

TLP:CLEAR

PostgreSQL ascii() function reads past end of buffer

NVD CVE.org

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Description

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 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

Details

CVSS Score: 4.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Confidence: 90%
Published: Aug 13, 2026
Last Modified: Aug 13, 2026

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