Detections
Analytics
SCA: security update for org.apache.kafka:kafka-clients (GHSA-28jg-cgg7-j4wc)
high Tenable Cloud Security Plugin ID 440825
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- A possible security vulnerability has been identified in Apache Kafka. By default, the broker property
`sasl.oauthbearer.jwt.validator.class` is set to
`org.apache.kafka.common.security.oauthbearer.DefaultJwtValidator`. It accepts any JWT token without
validating its signature, issuer, or audience. An attacker can generate a JWT token from any issuer with
the `preferred_username` set to any user, and the broker will accept it. We advise the Kafka users using
kafka v4.1.0 or v4.1.1 to set the config `sasl.oauthbearer.jwt.validator.class` to
`org.apache.kafka.common.security.oauthbearer.BrokerJwtValidator` explicitly to avoid this vulnerability.
Since Kafka v4.1.2 and v4.2.0 and later, the issue is fixed and will correctly validate the JWT token.
(CVE-2026-33557)
Solution
Update the org.apache.kafka:kafka-clients library and its related packages to version 4.1.2 or later.See Also
Plugin Details
Severity: High
ID: 440825
Version: Revision 1.2
Type: Local
Family: SCA Checks
Published: 4/24/2026
Updated: 6/30/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Medium
Score: 4.3
Percentile: 53.61
Vendor
Vendor Severity: Critical
CVSS v2
Risk Factor: High
Base Score: 9.4
Temporal Score: 7
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N
CVSS Score Source: CVE-2026-33557
CVSS v3
Risk Factor: High
Base Score: 8.6
Temporal Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 4/20/2026
Vulnerability Publication Date: 4/20/2026
Reference Information
CVE: CVE-2026-33557
cwe: CWE-1285