How severe is CVE-2026-95844?

CVE-2026-95844 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-95844 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-95844?

CVE-2026-95844 affects Moquette. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-95844?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-95844 published?

CVE-2026-95844 was published on 2026-09-23 and last updated on 2026-09-29.

CVE-2026-95844

CVE-2026-95844 is a high-severity vulnerability in Moquette with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-674.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-674
Affected product: Moquette
Published: 2026-09-23
Last modified: 2026-09-29

Description

Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, Moquette does not limit the depth of topic names and topic filters before processing them through recursive CTrie insertion and matching operations. A remote client can publish or subscribe with a deeply nested topic, causing a StackOverflowError that disrupts session processing and can deny service to broker clients. This issue is fixed in version 0.18.1.

Frequently asked questions

What is CVE-2026-95844?: Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, Moquette does not limit the depth of topic names and topic filters before processing them through recursive CTrie insertion and matching operations. A remote client can publish or subscribe with a deeply nested topic, causing a StackOverflowError that disrupts session processing and can deny service to broker clients. This issue is fixed in version 0.18.1.
How severe is CVE-2026-95844?: CVE-2026-95844 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-95844 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-95844?: CVE-2026-95844 affects Moquette. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-95844?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-95844 published?: CVE-2026-95844 was published on 2026-09-23 and last updated on 2026-09-29.

References

Affected products (1)

cpe:2.3:a:moquette:moquette:*:*:*:*:*:*:*:*

More vulnerabilities in Moquette

CVE-2026-85724 — Critical (CVSS 9.6): Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when pattern-based ACL rules are configured,…
CVE-2026-95848 — Critical (CVSS 9.1): Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, when a configured authenticator or authorizator class…
CVE-2026-95847 — High (CVSS 7.5): Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, H2PersistentQueue derives a session's message-map name as…
CVE-2026-95846 — High (CVSS 7.5): Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will…
CVE-2026-95845 — High (CVSS 7.5): Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, the broker does not enforce a maximum length for pending…
CVE-2026-95843 — High (CVSS 7.5): Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.subscribe parses a shared-subscription filter…

All CVEs affecting Moquette →

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