CVE-2026-10143: Dpkp Kafka-Python

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Dpkp Kafka-Python: before 2.3.2 (fixed in 2.3.2)

Published 2026-06-10. Last modified 2026-10-08.