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Vulnerabilities

Vulnerability · CVE-2025-27818

A possible security vulnerability has been identified in Apache Kafka.

Published Jun 10, 2025 · catalog updated Feb 26, 2026 · Apache Software Foundation Apache Kafka

Check if you run it

No confirmed exploitation is on record for CVE-2025-27818. EPSS is 1.07%. Act only if a listed version of Apache Software Foundation Apache Kafka is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.07%
Remediation
Vendor / distro source
Affected products
vendor Apache Software Foundation Apache Kafka 2.3.0 ≤3.9.0

A possible security vulnerability has been identified in Apache Kafka. This requires access to a alterConfig to the cluster resource, or Kafka Connect worker, and the ability to create/modify connectors on it with an arbitrary Kafka client SASL JAAS config and a SASL-based security protocol, which has been possible on Kafka clusters since Apache Kafka 2.0.0 (Kafka Connect 2.3.0). When configuring the broker via config file or AlterConfig command, or connector via the Kafka Kafka Connect REST API, an authenticated operator can set the property for any of the connector's Kafka clients to "com.su

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Apache Software Foundation Apache Kafka 2.3.0 ≤3.9.02.3.0 ≤3.9.0

How to fix CVE-2025-27818

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-27818. EPSS is 1.07%. Act only if a listed version of Apache Software Foundation Apache Kafka is installed.

Which versions are affected?

Compare what you have installed with Apache Software Foundation Apache Kafka 2.3.0 ≤3.9.0 2.3.0 ≤3.9.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 1.07%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 10, 2025 · EUVD

    Detected

    A possible security vulnerability has been identified in Apache Kafka. This requires access to a alterConfig to the cluster resource, or Kafka Connect worker, and the ability to create/modify connectors on it with an arbitrary Kafka client SASL JAAS config and a SASL-based security protocol, which has been possible on Kafka clusters since Apache Kafka 2.0.0 (Kafka Connect 2.3.0). When configuring

  2. Feb 26, 2026 · EUVD

    Updated

    A possible security vulnerability has been identified in Apache Kafka. This requires access to a alterConfig to the cluster resource, or Kafka Connect worker, and the ability to create/modify connectors on it with an arbitrary Kafka client SASL JAAS config and a SASL-based security protocol, which has been possible on Kafka clusters since Apache Kafka 2.0.0 (Kafka Connect 2.3.0). When configuring

Sources

  • CVE.orgVulnerability recordCVE-2025-27818

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-17639

    A possible security vulnerability has been identified in Apache Kafka. This requires access to a alterConfig to the cluster resource, or Kafka Connect worker, and the ability to create/modify connectors on it with an arbitrary Kafka client SASL JAAS config and a SASL-based securi

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.