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NVD Vulnerability Details :
CVE-2026-33558
Analyzed
More InfoOfficial Page
Source-security@apache.org
View Known Exploited Vulnerability (KEV) details
Published At-20 Apr, 2026 | 14:16
Updated At-22 Apr, 2026 | 14:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CPE Matches
The Apache Software Foundation
apache
>>kafka>>Versions from 0.11.0.0(inclusive) to 3.9.2(exclusive)
cpe:2.3:a:apache:kafka:*:*:*:*:*:*:*:*
The Apache Software Foundation
apache
>>kafka>>4.0.0
cpe:2.3:a:apache:kafka:4.0.0:-:*:*:*:*:*:*
The Apache Software Foundation
apache
>>kafka>>4.0.0
cpe:2.3:a:apache:kafka:4.0.0:rc0:*:*:*:*:*:*
The Apache Software Foundation
apache
>>kafka>>4.0.0
cpe:2.3:a:apache:kafka:4.0.0:rc1:*:*:*:*:*:*
The Apache Software Foundation
apache
>>kafka>>4.0.0
cpe:2.3:a:apache:kafka:4.0.0:rc3:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-533Secondarysecurity@apache.org
CWE ID: CWE-533
Type: Secondary
Source: security@apache.org
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://kafka.apache.org/cve-listsecurity@apache.org
Vendor Advisory
https://lists.apache.org/thread/pz5g4ky3h0k91tfd14p0dzqjp80960klsecurity@apache.org
Mitigation
Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/17/3af854a3a-2127-422b-91ae-364da2661108
Mailing List
Hyperlink: https://kafka.apache.org/cve-list
Source: security@apache.org
Resource:
Vendor Advisory
Hyperlink: https://lists.apache.org/thread/pz5g4ky3h0k91tfd14p0dzqjp80960kl
Source: security@apache.org
Resource:
Mitigation
Vendor Advisory
Hyperlink: http://www.openwall.com/lists/oss-security/2026/04/17/3
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Mailing List
Change History
0Changes found
Details not found