CVE-2026-10143: kafka-python prior to 2.3.2 contains a denial-of-service vulnerability in SCRAM authentication handling that a

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HIGH 7.5REMOTEUPGRADE

CVE-2026-10143 is a high-severity flaw (CVSS 7.5) affecting kafka-python. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-400, CWE-606
Published	2026-06-10
Last modified	2026-10-08

Publisher (CNA): VulnCheck · Vendor: dpkp

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-10 22:16 UTCPublished CVE record published
2026-10-08 16:17 UTCUpdated Record last modified

dpkp kafka-python UPGRADE

Affected: < 2.3.2

Fixed in: 2.3.2

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show kafka-python

2. UPGRADE to 2.3.2

pip install --upgrade "kafka-python>=2.3.2"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-10143?

kafka-python: upgrade to 2.3.2. Exact commands for each OS are on this page.

Is CVE-2026-10143 being exploited?

CVE-2026-10143 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-10143 affect?

CVE-2026-10143 affects kafka-python. Severity is high (CVSS 7.5). 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

How urgent is CVE-2026-10143?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities · Apache Kafka vulnerabilities

Related CVEs

CVE-2026-10142 HIGH 7.5 UPGRADE kafka-python prior to 2.3.2 contains a denial-of-service vulnerability in the protocol parser that allows a ma

References

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