CVE-2026-6667 — PgBouncer before 1.25.2 did not perform an appropriate
CVE-2026-6667 — PgBouncer before 1.25.2 did not perform an appropriate authorization check for the KILL_CLIENT admin command. All users with access to the administration console (which itself requires authorization) could run this command. It would have been correct to allow only users listed in the
What This Means For You
- If your environment is affected by CWE-862, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-6667 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-6667 - Unauthorized PgBouncer KILL_CLIENT Command Execution
title: CVE-2026-6667 - Unauthorized PgBouncer KILL_CLIENT Command Execution
id: scw-2026-05-09-ai-1
status: experimental
level: high
description: |
Detects the execution of the KILL_CLIENT command in PgBouncer, which is vulnerable in versions prior to 1.25.2 due to insufficient authorization checks. This rule specifically targets the unauthorized use of this administrative command, which could be leveraged by an attacker to disrupt database connections.
author: SCW Feed Engine (AI-generated)
date: 2026-05-09
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-6667/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: authentication
detection:
selection:
Image|contains:
- 'pgbouncer'
CommandLine|contains:
- 'KILL_CLIENT'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-6667 | vulnerability | CVE-2026-6667 |
| CWE-862 | weakness | CWE-862 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 09, 2026 at 04:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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