CVE-2025-27818: Apache Kafka Deserialization of Untrusted Data vulnerability

CVE-2025-27818 · Severity: low · CVSS 3.1 · Published 2025-06-10

Apache Kafka Deserialization of Untrusted Data vulnerability

Technologies: org.apache.kafka:kafka_2.11 (Maven), org.apache.kafka:kafka_2.12 (Maven), org.apache.kafka:kafka_2.13 (Maven). Vendors: Maven.

Quick answers

Is CVE-2025-27818 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-27818 being exploited in the wild.
How severe is CVE-2025-27818?
Low severity, with a CVSS score of 3.1, published 10 June 2025.
Which products and versions are affected?
org.apache.kafka:kafka_2.11 (Maven) ECOSYSTEM:introduced=2.3.0,last_affected=2.4.1; org.apache.kafka:kafka_2.12 (Maven) ECOSYSTEM:introduced=2.3.0,fixed=3.9.1; org.apache.kafka:kafka_2.13 (Maven) ECOSYSTEM:introduced=2.4.0,fixed=3.9.1.
Is there a fix for CVE-2025-27818?
Yes. org.apache.kafka:kafka_2.12 (Maven): upgrade to 3.9.1 or later; org.apache.kafka:kafka_2.13 (Maven): upgrade to 3.9.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-27818?
Check whether you run org.apache.kafka:kafka_2.11 (Maven), org.apache.kafka:kafka_2.12 (Maven) or org.apache.kafka:kafka_2.13 (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • org.apache.kafka:kafka_2.12 (Maven): upgrade to 3.9.1 or later
    # set org.apache.kafka:kafka_2.12 to 3.9.1 in your pom.xml or build.gradle
  • org.apache.kafka:kafka_2.13 (Maven): upgrade to 3.9.1 or later
    # set org.apache.kafka:kafka_2.13 to 3.9.1 in your pom.xml or build.gradle

Affected products

  • org.apache.kafka:kafka_2.11 (Maven) ECOSYSTEM:introduced=2.3.0,last_affected=2.4.1
  • org.apache.kafka:kafka_2.12 (Maven) ECOSYSTEM:introduced=2.3.0,fixed=3.9.1
  • org.apache.kafka:kafka_2.13 (Maven) ECOSYSTEM:introduced=2.4.0,fixed=3.9.1

Identifiers

  • CVE-2025-27818
  • GHSA-76qp-h5mr-frr4

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