7.5

CVE-2025-27819: apache software foundation apache kafka Deserialization of Untrusted Data

CVSS: 7.5v3.1HighAnalyzed
AliasesGHSA-mcwh-c9pg-xw43BIT-kafka-2025-27819
Published 10-06-2025Last modified 10-06-2025
Open JSON

Vulnerability summary

CVE-2025-27819 is a high (CVSS 7.5) Deserialization of Untrusted Data vulnerability in apache software foundation apache kafka. EPSS estimates a 1.03% chance of exploitation in the next 30 days, higher than 63% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.03%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 10-06-2025
    PublishedVulnerability first disclosed.
  2. 10-06-2025
    Last modifiedVulnerability information updated.

Description

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 vulnerability. To exploit this vulnerability, the attacker needs to be able to connect to the Kafka cluster and have the AlterConfigs permission on the cluster resource. Since Apache Kafka 3.4.0, we have added a system property ("-Dorg.apache.kafka.disallowed.login.modules") to disable the problematic login modules usage in SASL JAAS configuration. Also by default "com.sun.security.auth.module.JndiLoginModule" is disabled in Apache Kafka 3.4.0, and "com.sun.security.auth.module.JndiLoginModule,com.sun.security.auth.module.LdapLoginModule" is disabled by default in in Apache Kafka 3.9.1/4.0.0

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

1.03%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

0.00 pp

From 1.03% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.03%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Org.apache.kafka8 products
  • kafka_2.10All versions (No fix recorded)
  • kafka_2.11All versions (No fix recorded)
  • kafka_2.12< 3.4.0
  • kafka_2.13< 3.4.0
  • kafka_2.8.0All versions (No fix recorded)
Apache1 product
  • kafka≥ 2.0.0, ≤ 3.3.2
Apache software foundation1 product

3 vendors · 10 products

References

4 links