CVE-2026-6669— Unbounded SCRAM iteration count causes CPU exhaustion in PgBouncer
一分钟漏洞结论
影响对象
n/a PgBouncer
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Missing upper bound on the key derivation iteration count accepted during SCRAM authentication to a backend server in PgBouncer through 1.25.2 allows a malicious or compromised PostgreSQL backend to cause uncontrolled CPU consumption in PgBouncer. The resultin
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一、 漏洞 CVE-2026-6669 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
Unbounded SCRAM iteration count causes CPU exhaustion in PgBouncer
来源: CVE Program / CVE List V5
Vulnerability Description
Missing upper bound on the key derivation iteration count accepted during SCRAM authentication to a backend server in PgBouncer through 1.25.2 allows a malicious or compromised PostgreSQL backend to cause uncontrolled CPU consumption in PgBouncer. The resulting key derivation cannot be interrupted in frontend builds such as PgBouncer. Because PgBouncer serves all clients from a single process, one backend can in this way stop it from serving traffic for every other database and client it is pooling, so the failure of a single backend is not contained.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| - | PgBouncer | 0 ~ 1.25.2 | - |
|
二、漏洞 CVE-2026-6669 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-6669 其他参考 (1)
同批安全公告 · n/a · 2026-09-23 · 共 8 条
| CVE-2026-19888 | 7.5 HIGH | NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer |
| CVE-2026-6668 | 7.5 HIGH | Integer overflow causes an infinite loop in packet buffer growth in PgBouncer |
| CVE-2026-79304 | 6.5 MEDIUM | CVE-2026-79304 |
| CVE-2026-79306 | 6.5 MEDIUM | CVE-2026-79306 |
| CVE-2026-95897 | 5.5 MEDIUM | Dask Loader core.py 反序列化漏洞 |
| CVE-2026-79310 | CVE-2026-79310 | |
| CVE-2025-63564 | CVE-2025-63564 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-6669
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