by Kastro
Paper/Archive/CVE-2026-95848

CVE-2026-95848

moquette-io moquette — Moquette fails open when configured authentication or authorization classes cannot load

EPSS 0.4%public exploitCVSS 9.3
critical.is priorityof 100
45
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 36.7.367 × 207.3Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when a configured authenticator or authorizator class cannot be loaded, Server.initializeAuthenticator and Server.initializeAuthorizatorPolicy treat the failure as though no custom class was configured and fall back to AcceptAllAuthenticator or PermitAllAuthorizatorPolicy. A misspelled class name, missing dependency, constructor failure, or classpath problem can therefore start the broker with authentication or authorization disabled even though the operator configured those controls. This issue is fixed in version 0.18.1.

Affected

ProductAffectedFixed inSource
moquette< 0.18.1–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhqrefgithub.com/moquette-io/moquette/pull/967refgithub.com/moquette-io/moquette/commit/14a2f4fd280c8f6a791600c306cbccecb7c67007refgithub.com/moquette-io/moquette/releases/tag/v0.18.1