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CVE-2026-85724

9.6 · CRITICAL

Moquette is a lightweight Java MQTT broker.

Published Sep 23, 2026moquetteCWE-155EPSS 0.32%

Overview

CVE-2026-85724 is a critical-severity vulnerability affecting moquette moquette. It was published on September 23, 2026 and has a CVSS 3.1 base score of 9.6 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when pattern-based ACL rules are configured, AuthorizationsCollector.canDoOperation substitutes client ID and username values directly into rules containing %c or %u and then treats the result as an MQTT topic filter. A client that uses + or # in either identity can broaden the substituted filter and gain cross-tenant read and write access. A # identity can also produce an invalid filter that triggers a NullPointerException in Topic.match and disrupts session processing. This issue is fixed in version 0.18.1.

Remediation

Check the references section for vendor advisories and patches from moquette. Update moquette to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
moquettemoquette>= 0, < 0.18.1Affected

References

GitHubgithub.com/moquette-io/moquette/commit/b4a98bb3f3425ece476ed073aa080c627c1239afGitHubgithub.com/moquette-io/moquette/releases/tag/v0.18.1GitHubgithub.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhqGitHubgithub.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq

How CyberStrike helps

Frequently asked questions

What is CVE-2026-85724?

CVE-2026-85724 is a critical-severity vulnerability affecting moquette moquette. It was published on September 23, 2026 and has a CVSS 3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2026-85724?

This vulnerability has a CVSS 3.1 base score of 9.6, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-85724?

Check the references section for vendor advisories and patches from moquette. Update moquette to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-85724?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-85724 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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