Dashboard / CVE-2026-33558

CVE-2026-33558

MEDIUM
MEDIUM Priority: 0.03 BB Relevance: 71/100
Published: 2026-04-20 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: Low
I: None
A: None

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.

Weakness Classification (1)

Affected Software (5)

VendorProductVersion
apache kafka 0.11.0.0 – 3.9.2
apache kafka 4.0.0
apache kafka 4.0.0
apache kafka 4.0.0
apache kafka 4.0.0

References & Advisories (3)

Bug Bounty Relevance

71 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

5.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploitation Probability

0.63%
Raw Score 0.006300
Percentile 50.1%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00630
2026-10-28
0.00630

Intelligence Sources

nvd ref →

External Links