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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a PostgreSQL unaffected
Version Status Constraints
18 affected < 18.5
17 affected < 17.11
16 affected < 16.15
15 affected < 15.19
0 affected < 14.24

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.postgresql.org/support/security/CVE-2026-18024/ cve-icon cve-icon
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
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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: PostgreSQL

Published:

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

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

Link: CVE-2026-18024

cve-icon Vulnrichment

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

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-18024

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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

Weaknesses