CVE-2026-83525

Medium

Description

Incorrect operator (CWE-480) in the FetchSnapshot RPC handler in Apache Kafka from 2.8.0 before 4.2.2, and from 4.3.0 before 4.3.2 on all platforms allows an authenticated attacker with CLUSTER_ACTION privilege to cause a denial of service (controller process termination) via a crafted FetchSnapshotRequest with an empty topics array or a topic with no partitions. Users are recommended to upgrade to version 4.2.2, 4.3.2, or 4.4.0, which fix this issue. Users on unsupported branches (4.1.x and earlier) should upgrade to 4.2.2 or later.

SeverityMedium

CVSS6.5

Exploit probability—

ProductApache Kafka

PublishedOct 28, 2026

First seenNov 4, 2026

Weakness typeCWE-480CWE-480

How to fix

Update

Apache Software Foundation Apache Kafka4.2.2, 4.3.2 or later

Patches

github.com/apache/kafka/pull/23185

Vendor advisories

kafka.apache.org/cve-list

Affected products

Product	Affected versions	Fixed in
Apache Software Foundation Apache Kafka	2.8.0 ≤ v < 4.2.2, 4.3.0 ≤ v < 4.3.2	4.2.2, 4.3.2

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