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Not scored
CVE-2026-83525
Apache Kafka: Incorrect boolean operator in FetchSnapshot RPC handler allows authenticated network clients to crash the KRaft controller via a malformed request.
org.apache.kafka:kafka-raft · CWE-480 · CWE-480Affectedorg.apache.kafka:kafka-raft
FixUpdate to 4.2.2, 4.3.2 or newer
PublishedOct 28, 16:37 · apache
ScoredNot yet
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:05 UTC
What we know
No known exploitation. CISA KEV, checked 22:05 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
No severity score yet.
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.
From apache
Affected and fixed versions
ProductAffectedFixed inorg.apache.kafka:kafka-raft2.8.0 – before 4.2.24.2.2org.apache.kafka:kafka-raft4.3.0 – before 4.3.24.3.2
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known