CVE-2026-85724CWE-155CWE-863broken-access-control

CVE-2026-85724

Critical · published September 23, 2026

CVSS v3.1
9.6
EPSS
0%
Percentile
18.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.6 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00270 · 18.2th percentile
Weaknesses
CWE-155 · Improper Neutralization of Wildcards or Matching Symbols; CWE-863 · Incorrect Authorization
Published
2026-09-23T21:17Z
Affected products (1)
ProductVersionsFixed in
moquette/moquette< 0.18.10.18.1
References (4)
https://github.com/moquette-io/moquette/commit/b4a98bb3f3425ece476ed073aa080c627c1239af · [email protected]https://github.com/moquette-io/moquette/releases/tag/v0.18.1 · [email protected]https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq · [email protected]https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 25 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 23 SEP 16:29Z
    Moquette pattern ACL wildcard injection allows cross-tenant authorization bypass
    cvelistv5