CVE-2026-10143— kafka-python prior to 2.3.2 DoS via SCRAM Iteration Count in scram.py
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Dana Powers | kafka-python | < 2.3.2 | affected |
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I. Basic Information for CVE-2026-10143
Vulnerability Information
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Vulnerability Title
kafka-python prior to 2.3.2 DoS via SCRAM Iteration Count in scram.py
Source: NVD (National Vulnerability Database)
Vulnerability Description
kafka-python prior to 2.3.2 contains a denial-of-service vulnerability in SCRAM authentication handling that allows a malicious or machine-in-the-middle broker to freeze the client event loop by supplying an excessively large iteration count. In scram.py, ScramClient.process_server_first_message() passes the broker-controlled SCRAM iteration count directly to hashlib.pbkdf2_hmac() without validation, blocking producer sends, consumer polls, admin operations, and heartbeats, which can cause consumer group eviction and repeated reconnect failures.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)
Vulnerability Title
kafka-python 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
kafka-python是Dana Powers个人开发者的一个纯Python编写的分布式流处理引擎客户端库。 kafka-python 2.3.2之前版本存在资源管理错误漏洞，该漏洞源于SCRAM认证处理中未验证迭代次数，可能导致恶意代理冻结客户端事件循环。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Dana Powers | kafka-python | 0 ~ 2.3.2 | - |
II. Public POCs for CVE-2026-10143
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 10373 chars
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III. Intelligence Information for CVE-2026-10143
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Patches & Fixes for CVE-2026-10143 (3)
Vendor Advisories for CVE-2026-10143 (1)
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V. Comments for CVE-2026-10143
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