CVE-2026-10143 | 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,
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.
- 🔗 github.com/dpkp/kafka-python/pull/3019
- 🔗 github.com/dpkp/kafka-python/commit/6e4831444f972d16…
- 🔗 github.com/dpkp/kafka-python/pull/3026
- 🔗 www.vulncheck.com/advisories/kafka-python-prior-to-dos-via-…
- 🔗 access.redhat.com/errata/RHSA-2026:28571
- 🔗 access.redhat.com/errata/RHSA-2026:30076
- 🔗 access.redhat.com/errata/RHSA-2026:33683
- 🔗 access.redhat.com/errata/RHSA-2026:41066
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CVE-2026-10143 | 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,
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 coun