Quick answers
- Is CVE-2026-95844 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-95844 being exploited in the wild.
- How severe is CVE-2026-95844?
- Informational severity, published 23 September 2026.
- Which products and versions are affected?
- Moquette prior to 0.18.1.
- Is there a fix for CVE-2026-95844?
- A patch was published on 2026-08-01: Fixed in version 0.18.1 released on August 1, 2026 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-95844 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-95844?
- Check whether you run Moquette at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The broker does not enforce a maximum nesting depth on MQTT topic names or filters before processing them through recursive CTrie insertion and matching operations. A remote, unauthenticated client can trigger a StackOverflowError by publishing or subscribing to a topic with excessive depth, disrupting the session event loop. The fix introduces a configurable MAX_TOPIC_DEPTH limit (default 1024) enforced at publish, subscribe, and SubscriptionDirectory entry points.
Affected products
- Moquette Moquette prior to 0.18.1
Timeline
- 2026-09-23: disclosed
- 2026-08-01: patched: Fixed in version 0.18.1 released on August 1, 2026