---
id: CVE-2026-83525
title: >-
  Apache Kafka: Incorrect boolean operator in FetchSnapshot RPC handler allows
  authenticated network clients to crash the KRaft controller via a malformed
  request.
summary: |-
  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 servi…
severity: none
cwe:
  - CWE-480
vendor: Apache Software Foundation
product: 'org.apache.kafka:kafka-raft'
affected:
  - 'org.apache.kafka:kafka-raft >= 2.8.0 < 4.2.2'
  - 'org.apache.kafka:kafka-raft >= 4.3.0 < 4.3.2'
published: '2026-10-28'
updated: '2026-10-28'
sourceUpdated: '2026-10-28T20:07:03.066Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-83525'
references:
  - url: 'https://github.com/apache/kafka/pull/23185'
  - url: 'https://kafka.apache.org/cve-list'
tags:
  - cve.org
epss: 0.00186
epssPercentile: 0.08202
ingestedAt: '2026-10-28T17:14:44.467Z'
---

## Overview

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.

## Affected

- `org.apache.kafka:kafka-raft >= 2.8.0 < 4.2.2`
- `org.apache.kafka:kafka-raft >= 4.3.0 < 4.3.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.