CVE-2026-6637
HIGH EPSS 29.6%
Published May 14, 20261mo ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
Published May 14, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
29.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 2
CWE-121
CWE-89 SQL Injection Injection
Affected Products 5
| Vendor | Product | Version | Range |
|---|---|---|---|
| postgresql | postgresql | * | <14.23 |
| postgresql | postgresql | * | ≥15.0 – <15.18 |
| postgresql | postgresql | * | ≥16.0 – <16.14 |
| postgresql | postgresql | * | ≥17.0 – <17.10 |
| postgresql | postgresql | * | ≥18.0 – <18.4 |
References 1
- postgresql.org https://www.postgresql.org/support/security/CVE-2026-6637/
Remediation
- postgresql.org https://www.postgresql.org/support/security/CVE-2026-6637/