Buffer Over-read Vulnerability in PostgreSQL by PostgreSQL Global Development Group
CVE-2026-18024

4.3MEDIUM

Key Information:

Vendor

PostgreSQL Global Development Group

Status
Postgresql
Vendor
CVE Published:
13 August 2026

What is CVE-2026-18024?

The vulnerability allows a user to exploit the ascii() SQL function to read up to 3 bytes beyond the allocated memory space, potentially disclosing sensitive information. This issue is similar to a previously resolved vulnerability but poses a reduced risk. Affected versions include specific releases prior to PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24.

Affected Version(s)

PostgreSQL 18 < 18.5

PostgreSQL 17 < 17.11

PostgreSQL 16 < 16.15

References

https://www.postgresql.org/support/security/CVE-2026-18024/

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

The PostgreSQL project thanks Hcamael for reporting this problem.
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