CVE-2026-6637
May 14, 2026, 4:21 p.m.
8.8
High
Description
Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the database user performing the primary key update. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
Product(s) Impacted
| Vendor | Product | Versions |
|---|---|---|
| Postgresql |
|
|
Weaknesses
Common security weaknesses mapped to this vulnerability.
CWE-89
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.
*CPE(s)
Affected systems and software identified for this CVE.
| Type | Vendor | Product | Version | Update | Edition | Language | Software Edition | Target Software | Target Hardware | Other Information |
|---|---|---|---|---|---|---|---|---|---|---|
| a | postgresql | postgresql | / | / | / | / | / | / | / | / |
| a | postgresql | postgresql | <18.4 | / | / | / | / | / | / | |
| a | postgresql | postgresql | <17.10 | / | / | / | / | / | / | |
| a | postgresql | postgresql | <16.14 | / | / | / | / | / | / | |
| a | postgresql | postgresql | <15.18 | / | / | / | / | / | / | |
| a | postgresql | postgresql | <14.23 | / | / | / | / | / | / |
Tags
CVSS Score
CVSS Data - 3.1
- Attack Vector: NETWORK
- Attack Complexity: LOW
- Privileges Required: LOW
- Scope: UNCHANGED
- Confidentiality Impact: HIGH
- Integrity Impact: HIGH
- Availability Impact: HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Timeline
Published: May 14, 2026, 2:16 p.m.
Last Modified: May 14, 2026, 4:21 p.m.
Last Modified: May 14, 2026, 4:21 p.m.
Status : Undergoing Analysis
CVE has been recently published to the CVE List and has been received by the NVD.
More infoSource
f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.