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.
References
| Link | Resource |
|---|---|
| https://github.com/dpkp/kafka-python/commit/6e4831444f972d169cdd11f5c8d50333cea3f19b | Patch |
| https://github.com/dpkp/kafka-python/pull/3019 | Issue Tracking Patch |
| https://github.com/dpkp/kafka-python/pull/3026 | Issue Tracking Patch |
| https://www.vulncheck.com/advisories/kafka-python-prior-to-dos-via-scram-iteration-count-in-scram-py | Patch Third Party Advisory |
Configurations
History
11 Jun 2026, 19:11
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/dpkp/kafka-python/commit/6e4831444f972d169cdd11f5c8d50333cea3f19b - Patch | |
| References | () https://github.com/dpkp/kafka-python/pull/3019 - Issue Tracking, Patch | |
| References | () https://github.com/dpkp/kafka-python/pull/3026 - Issue Tracking, Patch | |
| References | () https://www.vulncheck.com/advisories/kafka-python-prior-to-dos-via-scram-iteration-count-in-scram-py - Patch, Third Party Advisory | |
| CPE | cpe:2.3:a:dpkp:kafka-python:*:*:*:*:*:python:*:* | |
| First Time |
Dpkp kafka-python
Dpkp |
10 Jun 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-10 22:16
Updated : 2026-06-11 19:11
NVD link : CVE-2026-10143
Mitre link : CVE-2026-10143
CVE.ORG link : CVE-2026-10143
JSON object : View
Products Affected
dpkp
- kafka-python
CWE
CWE-400
Uncontrolled Resource Consumption