5.3

CVE-2026-33558: apache software foundation apache kafka

CVSS: 5.3v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-33558CGA-2224-223c-rxcxCGA-3928-cfqf-wr22
Published 20-04-2026Last modified 20-04-2026
Open JSON

Vulnerability summary

CVE-2026-33558 is a medium (CVSS 5.3) vulnerability in apache software foundation apache kafka. EPSS estimates a 0.89% chance of exploitation in the next 30 days, higher than 58.6% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.89%
0%100%
Low · +0.26 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-WWC6-JRQV-G3VF

Timeline

  1. 20-04-2026
    PublishedVulnerability first disclosed.
  2. 20-04-2026
    Last modifiedVulnerability information updated.

Description

Information exposure vulnerability has been identified in Apache Kafka. The NetworkClient component will output entire requests and responses information in the DEBUG log level in the logs. By default, the log level is set to INFO level. If the DEBUG level is enabled, the sensitive information will be exposed via the requests and responses output log. The entire lists of impacted requests and responses are: * AlterConfigsRequest * AlterUserScramCredentialsRequest * ExpireDelegationTokenRequest * IncrementalAlterConfigsRequest * RenewDelegationTokenRequest * SaslAuthenticateRequest * createDelegationTokenResponse * describeDelegationTokenResponse * SaslAuthenticateResponse This issue affects Apache Kafka: from any version supported the listed API above through v3.9.1, v4.0.0. We advise the Kafka users to upgrade to v3.9.2, v4.0.1, or later to avoid this vulnerability.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.89%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

+0.26 pp

From 0.63% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.89%

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

Chainguard35 products
  • automq< 1.7.4-r1 | All versions (No fix recorded)
  • automq-fipsAll versions (No fix recorded) | < 1.7.4-r1
  • druid< 36.0.0-r15
  • hadoop-fips-3.3.6All versions (No fix recorded)
  • hadoop-fips-3.4.2All versions (No fix recorded)
Wolfi16 products
  • druid< 36.0.0-r15
  • kafka_exporter-strimzi-compat< 1.2.0-r5
  • kafka-strimzi-compat< 1.2.0-r5
  • prometheus-jmx-exporter-strimzi-compat< 1.6.0-r0
  • strimzi-kafka-operator< 1.2.0-r5 | All versions (No fix recorded)
Apache software foundation2 products
Apache1 product
  • kafka≥ 0.11.0.0, < 3.9.2 | 4.0.0 | 4.0.0:rc0 | 4.0.0:rc1 | 4.0.0:rc3
Org.apache.kafka1 product
  • kafka-clients≥ 0.11.0, < 3.9.2 | ≥ 4.0.0, < 4.0.1
Ubuntu1 product
  • kafkaAll versions (No fix recorded)

6 vendors · 56 products

References

9 links