CVE-2026-83525: vulnerability in Apache Kafka
Apache Kafka: Incorrect boolean operator in FetchSnapshot RPC handler allows authenticated network clients to crash the KRaft controller via a malformed request.
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
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 products
Apache Software Foundation · Apache KafkaRelated CVEs — Apache Kafka
In the same product, most dangerous first.
CVE-2021-38153—Timing Attack Vulnerability for Apache Kafka Connect and ClientsEPSS 6.2%CVE-2018-1288—CVE-2018-1288EPSS 4.8%CVE-2017-12610—CVE-2017-12610EPSS 2.9%CVE-2022-34917HIGHUnauthenticated clients may cause OutOfMemoryError on Apache Kafka BrokersEPSS 1.5%CVE-2024-27309HIGHApache Kafka: Potential incorrect access control during migration from ZK mode to KRaft modeEPSS 1.1%CVE-2025-27818HIGHApache Kafka: Possible RCE attack via SASL JAAS LdapLoginModule configurationEPSS 1.1%