Is this vulnerability remotely exploitable?

Yes, if Kafka listeners are exposed (directly or via ingress/load balancers) and rely on mTLS for client authentication. Any party able to obtain a valid certificate from one of the CAs in the configured chain may be able to authenticate over the network, subject to network reachability and additional authorization controls.

What level of access does an attacker need?

The attacker needs the ability to obtain or control a TLS client certificate issued by

CA inside the configured multistage CA chain. They do not need access to Strimzi configuration itself; they only need to present a certificate that the misconfigured trust store accepts.

Severity:

HIGH RISK

(8.1)

Improper Certificate Trust Configuration (CWE-295) in Strimzi mTLS Listeners with Multistage CA Chains

CVE-2026-27134

Published:

Feb 20, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Authentication and TLS Certificate Validation Misconfiguration

CWE:

CWE-287;CWE-295;CWE-296

Impact:

Improperly trusted client identities and unauthorized access via mTLS

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Authentication and TLS Certificate Validation Misconfiguration

CWE:

CWE-287;CWE-295;CWE-296

Impact:

Improperly trusted client identities and unauthorized access via mTLS

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Improper Certificate Trust Configuration (CWE-295) in Strimzi mTLS Listeners with Multistage CA Chains

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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