CVE-2026-18024 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products

References

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

History

Thu, 13 Aug 2026 16:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 13 Aug 2026 13:15:00 +0000

Type	Values Removed	Values Added
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.
Title		PostgreSQL ascii() function reads past end of buffer
Weaknesses		CWE-126
References		https://www.postgresql.org/support/security/CVE-2026-18024/
Metrics		cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}`

MITRE

Status: PUBLISHED

Assigner: PostgreSQL

Published: 2026-08-13T13:00:14.322Z

Updated: 2026-08-13T15:39:03.530Z

Reserved: 2026-07-28T01:59:49.926Z

Link: CVE-2026-18024

Vulnrichment

Updated: 2026-08-13T15:38:55.256Z

NVD

Status : Received

Published: 2026-08-13T13:17:47.880

Modified: 2026-08-13T16:17:58.313

Link: CVE-2026-18024

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-08-13T15:15:13Z

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