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

Scoring

Severity

MEDIUM

CVSS base score

4.3

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS probability

0.19%

CWE

CWE-126

Published

2026-08-13

Last modified

2026-08-29

Affected products

• n/a PostgreSQL
• n/a PostgreSQL
• n/a PostgreSQL
• n/a PostgreSQL
• n/a PostgreSQL

Weakness type

• CWE-126

Related vulnerabilities

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• CVE-2026-81399 — Microsoft Excel Information Disclosure Vulnerability
• CVE-2026-78516 — Windows Storage Information Disclosure Vulnerability
• CVE-2026-72974 — Microsoft Office Excel Information Disclosure Vulnerability
• CVE-2026-69626 — Microsoft Office Information Disclosure Vulnerability
• CVE-2026-72932 — Windows Message Queuing Queue Manager Information Disclosure Vulnerability

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