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Vulnerability Details 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, and heartbeats, which can cause consumer group eviction and repeated reconnect failures.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.005

EPSS Ranking 41.6%

CVSS Severity

CVSS v3 Score 7.5

References

Products affected by CVE-2026-10143

Dpkp » Kafka-Python » Version: 0.1

cpe:2.3:a:dpkp:kafka-python:0.1
Dpkp » Kafka-Python » Version: 0.8.0

cpe:2.3:a:dpkp:kafka-python:0.8.0
Dpkp » Kafka-Python » Version: 0.9.0

cpe:2.3:a:dpkp:kafka-python:0.9.0
Dpkp » Kafka-Python » Version: 0.9.1

cpe:2.3:a:dpkp:kafka-python:0.9.1
Dpkp » Kafka-Python » Version: 0.9.2

cpe:2.3:a:dpkp:kafka-python:0.9.2
Dpkp » Kafka-Python » Version: 0.9.3

cpe:2.3:a:dpkp:kafka-python:0.9.3
Dpkp » Kafka-Python » Version: 0.9.4

cpe:2.3:a:dpkp:kafka-python:0.9.4
Dpkp » Kafka-Python » Version: 0.9.5

cpe:2.3:a:dpkp:kafka-python:0.9.5
Dpkp » Kafka-Python » Version: 1.0.0

cpe:2.3:a:dpkp:kafka-python:1.0.0
Dpkp » Kafka-Python » Version: 1.0.1

cpe:2.3:a:dpkp:kafka-python:1.0.1
Dpkp » Kafka-Python » Version: 1.0.2

cpe:2.3:a:dpkp:kafka-python:1.0.2
Dpkp » Kafka-Python » Version: 1.1.0

cpe:2.3:a:dpkp:kafka-python:1.1.0
Dpkp » Kafka-Python » Version: 1.1.1

cpe:2.3:a:dpkp:kafka-python:1.1.1
Dpkp » Kafka-Python » Version: 1.2.0

cpe:2.3:a:dpkp:kafka-python:1.2.0
Dpkp » Kafka-Python » Version: 1.2.1

cpe:2.3:a:dpkp:kafka-python:1.2.1
Dpkp » Kafka-Python » Version: 1.2.2

cpe:2.3:a:dpkp:kafka-python:1.2.2
Dpkp » Kafka-Python » Version: 1.2.3

cpe:2.3:a:dpkp:kafka-python:1.2.3
Dpkp » Kafka-Python » Version: 1.2.4

cpe:2.3:a:dpkp:kafka-python:1.2.4
Dpkp » Kafka-Python » Version: 1.2.5

cpe:2.3:a:dpkp:kafka-python:1.2.5
Dpkp » Kafka-Python » Version: 1.3.0

cpe:2.3:a:dpkp:kafka-python:1.3.0
Dpkp » Kafka-Python » Version: 1.3.1

cpe:2.3:a:dpkp:kafka-python:1.3.1
Dpkp » Kafka-Python » Version: 1.3.2

cpe:2.3:a:dpkp:kafka-python:1.3.2
Dpkp » Kafka-Python » Version: 1.3.3

cpe:2.3:a:dpkp:kafka-python:1.3.3
Dpkp » Kafka-Python » Version: 1.3.4

cpe:2.3:a:dpkp:kafka-python:1.3.4
Dpkp » Kafka-Python » Version: 1.3.5

cpe:2.3:a:dpkp:kafka-python:1.3.5
Dpkp » Kafka-Python » Version: 1.4.0

cpe:2.3:a:dpkp:kafka-python:1.4.0
Dpkp » Kafka-Python » Version: 1.4.1

cpe:2.3:a:dpkp:kafka-python:1.4.1
Dpkp » Kafka-Python » Version: 1.4.2

cpe:2.3:a:dpkp:kafka-python:1.4.2
Dpkp » Kafka-Python » Version: 1.4.3

cpe:2.3:a:dpkp:kafka-python:1.4.3
Dpkp » Kafka-Python » Version: 1.4.4

cpe:2.3:a:dpkp:kafka-python:1.4.4
Dpkp » Kafka-Python » Version: 1.4.5

cpe:2.3:a:dpkp:kafka-python:1.4.5
Dpkp » Kafka-Python » Version: 1.4.6

cpe:2.3:a:dpkp:kafka-python:1.4.6
Dpkp » Kafka-Python » Version: 1.4.7

cpe:2.3:a:dpkp:kafka-python:1.4.7
Dpkp » Kafka-Python » Version: 2.0.0

cpe:2.3:a:dpkp:kafka-python:2.0.0
Dpkp » Kafka-Python » Version: 2.0.1

cpe:2.3:a:dpkp:kafka-python:2.0.1
Dpkp » Kafka-Python » Version: 2.0.2

cpe:2.3:a:dpkp:kafka-python:2.0.2
Dpkp » Kafka-Python » Version: 2.0.3

cpe:2.3:a:dpkp:kafka-python:2.0.3
Dpkp » Kafka-Python » Version: 2.0.4

cpe:2.3:a:dpkp:kafka-python:2.0.4
Dpkp » Kafka-Python » Version: 2.0.5

cpe:2.3:a:dpkp:kafka-python:2.0.5
Dpkp » Kafka-Python » Version: 2.0.6

cpe:2.3:a:dpkp:kafka-python:2.0.6
Dpkp » Kafka-Python » Version: 2.1.0

cpe:2.3:a:dpkp:kafka-python:2.1.0
Dpkp » Kafka-Python » Version: 2.1.1

cpe:2.3:a:dpkp:kafka-python:2.1.1
Dpkp » Kafka-Python » Version: 2.1.2

cpe:2.3:a:dpkp:kafka-python:2.1.2
Dpkp » Kafka-Python » Version: 2.1.3

cpe:2.3:a:dpkp:kafka-python:2.1.3
Dpkp » Kafka-Python » Version: 2.1.4

cpe:2.3:a:dpkp:kafka-python:2.1.4
Dpkp » Kafka-Python » Version: 2.1.5

cpe:2.3:a:dpkp:kafka-python:2.1.5
Dpkp » Kafka-Python » Version: 2.1.6

cpe:2.3:a:dpkp:kafka-python:2.1.6
Dpkp » Kafka-Python » Version: 2.2.0

cpe:2.3:a:dpkp:kafka-python:2.2.0
Dpkp » Kafka-Python » Version: 2.2.1

cpe:2.3:a:dpkp:kafka-python:2.2.1
Dpkp » Kafka-Python » Version: 2.2.10

cpe:2.3:a:dpkp:kafka-python:2.2.10
Dpkp » Kafka-Python » Version: 2.2.11

cpe:2.3:a:dpkp:kafka-python:2.2.11
Dpkp » Kafka-Python » Version: 2.2.12

cpe:2.3:a:dpkp:kafka-python:2.2.12
Dpkp » Kafka-Python » Version: 2.2.13

cpe:2.3:a:dpkp:kafka-python:2.2.13
Dpkp » Kafka-Python » Version: 2.2.14

cpe:2.3:a:dpkp:kafka-python:2.2.14
Dpkp » Kafka-Python » Version: 2.2.15

cpe:2.3:a:dpkp:kafka-python:2.2.15
Dpkp » Kafka-Python » Version: 2.2.16

cpe:2.3:a:dpkp:kafka-python:2.2.16
Dpkp » Kafka-Python » Version: 2.2.17

cpe:2.3:a:dpkp:kafka-python:2.2.17
Dpkp » Kafka-Python » Version: 2.2.18

cpe:2.3:a:dpkp:kafka-python:2.2.18
Dpkp » Kafka-Python » Version: 2.2.19

cpe:2.3:a:dpkp:kafka-python:2.2.19
Dpkp » Kafka-Python » Version: 2.2.2

cpe:2.3:a:dpkp:kafka-python:2.2.2
Dpkp » Kafka-Python » Version: 2.2.20

cpe:2.3:a:dpkp:kafka-python:2.2.20
Dpkp » Kafka-Python » Version: 2.2.3

cpe:2.3:a:dpkp:kafka-python:2.2.3
Dpkp » Kafka-Python » Version: 2.2.4

cpe:2.3:a:dpkp:kafka-python:2.2.4
Dpkp » Kafka-Python » Version: 2.2.5

cpe:2.3:a:dpkp:kafka-python:2.2.5
Dpkp » Kafka-Python » Version: 2.2.6

cpe:2.3:a:dpkp:kafka-python:2.2.6
Dpkp » Kafka-Python » Version: 2.2.7

cpe:2.3:a:dpkp:kafka-python:2.2.7
Dpkp » Kafka-Python » Version: 2.2.8

cpe:2.3:a:dpkp:kafka-python:2.2.8
Dpkp » Kafka-Python » Version: 2.2.9

cpe:2.3:a:dpkp:kafka-python:2.2.9
Dpkp » Kafka-Python » Version: 2.3.0

cpe:2.3:a:dpkp:kafka-python:2.3.0
Dpkp » Kafka-Python » Version: 2.3.1

cpe:2.3:a:dpkp:kafka-python:2.3.1

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Vulnerable Software

Vulnerability Details CVE-2026-10143

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