1. Home
  2. CVE Database
  3. CVE-2026-18024
MEDIUM · 4.3

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...

Vulnerability 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 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
PostgresqlPostgresql>= 14.0, < 14.24

Related Weaknesses (CWE)

CWE-126

References

FAQ

What is CVE-2026-18024?

CVE-2026-18024 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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...

How severe is CVE-2026-18024?

CVE-2026-18024 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18024?

Check the references section above for vendor advisories and patch information. Affected products include: Postgresql Postgresql.