Stack-based Buffer Overflow Affecting cesanta/mongoose package, versions [,7.22)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-CESANTAMONGOOSE-20186769
- published28 Sept 2026
- disclosed28 Sept 2026
- creditUnknown
Introduced: 28 Sep 2026
NewCVE-2026-101003 (opens in a new tab)How to fix?
Upgrade cesanta/mongoose to version 7.22 or higher.
Overview
cesanta/mongoose is a networking library for C/C++. It implements event-driven non-blocking APIs for TCP, UDP, HTTP, WebSocket, MQTT.
Affected versions of this package are vulnerable to Stack-based Buffer Overflow via the fn function. An attacker can cause a denial of service by sending specially crafted MQTT messages remotely.