Critical 9.6Published Sep 23, 2026

CVE-2026-85724Moquette pattern ACL wildcard injection allows cross-tenant authorization bypass

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects moquette-io moquette and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for moquette-io moquette

Exploited in the last 30 days

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.

CVSS: 9.6 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Weakness (CWE): CWE-863, CWE-155
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Sep 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

moquette-io moquette moquette_io:moquette (from the name)	before 0.18.1	CNA record
moquette moquette moquette:moquette	before 0.18.1	NVD

References

https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhqx-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/moquette-io/moquette/commit/b4a98bb3f3425ece476ed073aa080c627c1239afx-refsource-misc, patch
https://github.com/moquette-io/moquette/releases/tag/v0.18.1x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.