What is CVE-2025-27819?

CVE-2025-27819 is a high-severity vulnerability in Apache Kafka, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2025-06-10.

How severe is CVE-2025-27819?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2025-27819 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Apache Kafka

CVE-2025-27819

In CVE-2023-25194, we announced the RCE/Denial of service attack via SASL JAAS JndiLoginModule configuration in Kafka Connect API. But not only Kafka Connect API is vulnerable to this attack, the Apache Kafka brokers also have this vulnera…

Vulnerability class: Insecure Deserialization

EPSS: 0.009 (54.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Apache Kafka
Apache Software Foundation Kafka — versions 2.0.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

security@apache.org (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2025-27819?: CVE-2025-27819 is a high-severity vulnerability in Apache Kafka, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2025-06-10.
How severe is CVE-2025-27819?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-27819 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.